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Finding the Fourth Proportional to 390,618.28, 585,733.56 and 124,344.16

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Solution

The fourth proportional to 390,618.28, 585,733.56 and 124,344.16 is: 186,454.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,618.28 : 585,733.56 = 124,344.16 : x
  2. Step 2: Convert to fraction form
    390,618.28/585,733.56 = 124,344.16/x
  3. Step 3: Cross multiply
    390,618.28x = 585,733.56 × 124,344.16
  4. Step 4: Simplify right side
    390,618.28x = 72,832,547,502.01
  5. Step 5: Solve for x
    x = 72,832,547,502.01/390,618.28
  6. Step 6: Final answer
    x = 186,454.53

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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.