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Finding the Fourth Proportional to 402,713.60, 555,746.22 and 221,436.96

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Solution

The fourth proportional to 402,713.60, 555,746.22 and 221,436.96 is: 305,583.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,713.60 : 555,746.22 = 221,436.96 : x
  2. Step 2: Convert to fraction form
    402,713.60/555,746.22 = 221,436.96/x
  3. Step 3: Cross multiply
    402,713.60x = 555,746.22 × 221,436.96
  4. Step 4: Simplify right side
    402,713.60x = 123,062,753,488.29
  5. Step 5: Solve for x
    x = 123,062,753,488.29/402,713.60
  6. Step 6: Final answer
    x = 305,583.80

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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.