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Finding the Fourth Proportional to 691,638.57, 954,459.38 and 385,715.31

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Solution

The fourth proportional to 691,638.57, 954,459.38 and 385,715.31 is: 532,286.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,638.57 : 954,459.38 = 385,715.31 : x
  2. Step 2: Convert to fraction form
    691,638.57/954,459.38 = 385,715.31/x
  3. Step 3: Cross multiply
    691,638.57x = 954,459.38 × 385,715.31
  4. Step 4: Simplify right side
    691,638.57x = 368,149,593,710.53
  5. Step 5: Solve for x
    x = 368,149,593,710.53/691,638.57
  6. Step 6: Final answer
    x = 532,286.10

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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.