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Finding the Fourth Proportional to 353,470.20, 487,630.20 and 238,711.56

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Solution

The fourth proportional to 353,470.20, 487,630.20 and 238,711.56 is: 329,314.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,470.20 : 487,630.20 = 238,711.56 : x
  2. Step 2: Convert to fraction form
    353,470.20/487,630.20 = 238,711.56/x
  3. Step 3: Cross multiply
    353,470.20x = 487,630.20 × 238,711.56
  4. Step 4: Simplify right side
    353,470.20x = 116,402,965,745.11
  5. Step 5: Solve for x
    x = 116,402,965,745.11/353,470.20
  6. Step 6: Final answer
    x = 329,314.79

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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.