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Finding the Fourth Proportional to 390,414.20, 585,707.70 and 180,001.40

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Solution

The fourth proportional to 390,414.20, 585,707.70 and 180,001.40 is: 270,041.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,414.20 : 585,707.70 = 180,001.40 : x
  2. Step 2: Convert to fraction form
    390,414.20/585,707.70 = 180,001.40/x
  3. Step 3: Cross multiply
    390,414.20x = 585,707.70 × 180,001.40
  4. Step 4: Simplify right side
    390,414.20x = 105,428,205,990.78
  5. Step 5: Solve for x
    x = 105,428,205,990.78/390,414.20
  6. Step 6: Final answer
    x = 270,041.93

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1.5x scale

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.