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Finding the Fourth Proportional to 693,488.49, 957,043.68 and 387,564.87

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Solution

The fourth proportional to 693,488.49, 957,043.68 and 387,564.87 is: 534,856.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,488.49 : 957,043.68 = 387,564.87 : x
  2. Step 2: Convert to fraction form
    693,488.49/957,043.68 = 387,564.87/x
  3. Step 3: Cross multiply
    693,488.49x = 957,043.68 × 387,564.87
  4. Step 4: Simplify right side
    693,488.49x = 370,916,506,541.78
  5. Step 5: Solve for x
    x = 370,916,506,541.78/693,488.49
  6. Step 6: Final answer
    x = 534,856.04

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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.