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Finding the Fourth Proportional to 390,934.76, 539,547.99 and 247,708.22

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Solution

The fourth proportional to 390,934.76, 539,547.99 and 247,708.22 is: 341,874.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,934.76 : 539,547.99 = 247,708.22 : x
  2. Step 2: Convert to fraction form
    390,934.76/539,547.99 = 247,708.22/x
  3. Step 3: Cross multiply
    390,934.76x = 539,547.99 × 247,708.22
  4. Step 4: Simplify right side
    390,934.76x = 133,650,472,207.48
  5. Step 5: Solve for x
    x = 133,650,472,207.48/390,934.76
  6. Step 6: Final answer
    x = 341,874.11

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1.5x scale

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.