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Finding the Fourth Proportional to 390,614.27, 585,727.57 and 124,340.16

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Solution

The fourth proportional to 390,614.27, 585,727.57 and 124,340.16 is: 186,448.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,614.27 : 585,727.57 = 124,340.16 : x
  2. Step 2: Convert to fraction form
    390,614.27/585,727.57 = 124,340.16/x
  3. Step 3: Cross multiply
    390,614.27x = 585,727.57 × 124,340.16
  4. Step 4: Simplify right side
    390,614.27x = 72,829,462,122.11
  5. Step 5: Solve for x
    x = 72,829,462,122.11/390,614.27
  6. Step 6: Final answer
    x = 186,448.55

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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.