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Finding the Fourth Proportional to 639,738,017.80, 959,607,026.70 and 536,425,887.40

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Solution

The fourth proportional to 639,738,017.80, 959,607,026.70 and 536,425,887.40 is: 804,638,831.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,738,017.80 : 959,607,026.70 = 536,425,887.40 : x
  2. Step 2: Convert to fraction form
    639,738,017.80/959,607,026.70 = 536,425,887.40/x
  3. Step 3: Cross multiply
    639,738,017.80x = 959,607,026.70 × 536,425,887.40
  4. Step 4: Simplify right side
    639,738,017.80x = 514,758,050,852,822,976
  5. Step 5: Solve for x
    x = 514,758,050,852,822,976/639,738,017.80
  6. Step 6: Final answer
    x = 804,638,831.10

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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.