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Finding the Fourth Proportional to 639,738,019.80, 959,607,029.70 and 536,425,889.40

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Solution

The fourth proportional to 639,738,019.80, 959,607,029.70 and 536,425,889.40 is: 804,638,834.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,738,019.80 : 959,607,029.70 = 536,425,889.40 : x
  2. Step 2: Convert to fraction form
    639,738,019.80/959,607,029.70 = 536,425,889.40/x
  3. Step 3: Cross multiply
    639,738,019.80x = 959,607,029.70 × 536,425,889.40
  4. Step 4: Simplify right side
    639,738,019.80x = 514,758,054,381,314,688
  5. Step 5: Solve for x
    x = 514,758,054,381,314,688/639,738,019.80
  6. Step 6: Final answer
    x = 804,638,834.10

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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.