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Finding the Fourth Proportional to 429,781.56, 644,449.86 and 192,920.28

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Solution

The fourth proportional to 429,781.56, 644,449.86 and 192,920.28 is: 289,280.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,781.56 : 644,449.86 = 192,920.28 : x
  2. Step 2: Convert to fraction form
    429,781.56/644,449.86 = 192,920.28/x
  3. Step 3: Cross multiply
    429,781.56x = 644,449.86 × 192,920.28
  4. Step 4: Simplify right side
    429,781.56x = 124,327,447,437.16
  5. Step 5: Solve for x
    x = 124,327,447,437.16/429,781.56
  6. Step 6: Final answer
    x = 289,280.55

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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.