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Finding the Fourth Proportional to 690,904,746.74, 953,447,168.22 and 393,546,876.32

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Solution

The fourth proportional to 690,904,746.74, 953,447,168.22 and 393,546,876.32 is: 543,093,901.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,904,746.74 : 953,447,168.22 = 393,546,876.32 : x
  2. Step 2: Convert to fraction form
    690,904,746.74/953,447,168.22 = 393,546,876.32/x
  3. Step 3: Cross multiply
    690,904,746.74x = 953,447,168.22 × 393,546,876.32
  4. Step 4: Simplify right side
    690,904,746.74x = 375,226,154,789,130,560
  5. Step 5: Solve for x
    x = 375,226,154,789,130,560/690,904,746.74
  6. Step 6: Final answer
    x = 543,093,901.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.