Home / 390,734.20-584,546.10-338,721.40

Finding the Fourth Proportional to 390,734.20, 584,546.10 and 338,721.40

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Solution

The fourth proportional to 390,734.20, 584,546.10 and 338,721.40 is: 506,733.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,734.20 : 584,546.10 = 338,721.40 : x
  2. Step 2: Convert to fraction form
    390,734.20/584,546.10 = 338,721.40/x
  3. Step 3: Cross multiply
    390,734.20x = 584,546.10 × 338,721.40
  4. Step 4: Simplify right side
    390,734.20x = 197,998,273,356.54
  5. Step 5: Solve for x
    x = 197,998,273,356.54/390,734.20
  6. Step 6: Final answer
    x = 506,733.92

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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.