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Finding the Fourth Proportional to 393,037.17, 542,323.71 and 220,931.28

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Solution

The fourth proportional to 393,037.17, 542,323.71 and 220,931.28 is: 304,847.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,037.17 : 542,323.71 = 220,931.28 : x
  2. Step 2: Convert to fraction form
    393,037.17/542,323.71 = 220,931.28/x
  3. Step 3: Cross multiply
    393,037.17x = 542,323.71 × 220,931.28
  4. Step 4: Simplify right side
    393,037.17x = 119,816,271,424.65
  5. Step 5: Solve for x
    x = 119,816,271,424.65/393,037.17
  6. Step 6: Final answer
    x = 304,847.18

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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.