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Finding the Fourth Proportional to 217,444.92, 325,635.84 and 128,434.20

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Solution

The fourth proportional to 217,444.92, 325,635.84 and 128,434.20 is: 192,337.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,444.92 : 325,635.84 = 128,434.20 : x
  2. Step 2: Convert to fraction form
    217,444.92/325,635.84 = 128,434.20/x
  3. Step 3: Cross multiply
    217,444.92x = 325,635.84 × 128,434.20
  4. Step 4: Simplify right side
    217,444.92x = 41,822,778,601.73
  5. Step 5: Solve for x
    x = 41,822,778,601.73/217,444.92
  6. Step 6: Final answer
    x = 192,337.35

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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.