Home / 390,726.08-539,307.12-229,689.04

Finding the Fourth Proportional to 390,726.08, 539,307.12 and 229,689.04

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Solution

The fourth proportional to 390,726.08, 539,307.12 and 229,689.04 is: 317,032.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,726.08 : 539,307.12 = 229,689.04 : x
  2. Step 2: Convert to fraction form
    390,726.08/539,307.12 = 229,689.04/x
  3. Step 3: Cross multiply
    390,726.08x = 539,307.12 × 229,689.04
  4. Step 4: Simplify right side
    390,726.08x = 123,872,934,657.97
  5. Step 5: Solve for x
    x = 123,872,934,657.97/390,726.08
  6. Step 6: Final answer
    x = 317,032.68

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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.