Home / 639,738,108.80-959,607,163.20-536,425,978.40

Finding the Fourth Proportional to 639,738,108.80, 959,607,163.20 and 536,425,978.40

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Solution

The fourth proportional to 639,738,108.80, 959,607,163.20 and 536,425,978.40 is: 804,638,967.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,738,108.80 : 959,607,163.20 = 536,425,978.40 : x
  2. Step 2: Convert to fraction form
    639,738,108.80/959,607,163.20 = 536,425,978.40/x
  3. Step 3: Cross multiply
    639,738,108.80x = 959,607,163.20 × 536,425,978.40
  4. Step 4: Simplify right side
    639,738,108.80x = 514,758,211,399,208,448
  5. Step 5: Solve for x
    x = 514,758,211,399,208,448/639,738,108.80
  6. Step 6: Final answer
    x = 804,638,967.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.