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Finding the Fourth Proportional to 390,862.29, 586,287.28 and 124,621.01

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Solution

The fourth proportional to 390,862.29, 586,287.28 and 124,621.01 is: 186,929.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,862.29 : 586,287.28 = 124,621.01 : x
  2. Step 2: Convert to fraction form
    390,862.29/586,287.28 = 124,621.01/x
  3. Step 3: Cross multiply
    390,862.29x = 586,287.28 × 124,621.01
  4. Step 4: Simplify right side
    390,862.29x = 73,063,712,360.65
  5. Step 5: Solve for x
    x = 73,063,712,360.65/390,862.29
  6. Step 6: Final answer
    x = 186,929.55

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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.