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Finding the Fourth Proportional to 402,432.76, 555,367.62 and 221,149.72

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Solution

The fourth proportional to 402,432.76, 555,367.62 and 221,149.72 is: 305,192.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,432.76 : 555,367.62 = 221,149.72 : x
  2. Step 2: Convert to fraction form
    402,432.76/555,367.62 = 221,149.72/x
  3. Step 3: Cross multiply
    402,432.76x = 555,367.62 × 221,149.72
  4. Step 4: Simplify right side
    402,432.76x = 122,819,393,660.07
  5. Step 5: Solve for x
    x = 122,819,393,660.07/402,432.76
  6. Step 6: Final answer
    x = 305,192.33

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Double scale
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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.