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Finding the Fourth Proportional to 618,562.98, 927,371.16 and 428,477.04

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Solution

The fourth proportional to 618,562.98, 927,371.16 and 428,477.04 is: 642,387.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,562.98 : 927,371.16 = 428,477.04 : x
  2. Step 2: Convert to fraction form
    618,562.98/927,371.16 = 428,477.04/x
  3. Step 3: Cross multiply
    618,562.98x = 927,371.16 × 428,477.04
  4. Step 4: Simplify right side
    618,562.98x = 397,357,249,618.17
  5. Step 5: Solve for x
    x = 397,357,249,618.17/618,562.98
  6. Step 6: Final answer
    x = 642,387.70

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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.