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Finding the Fourth Proportional to 523,069.52, 721,889.08 and 308,278.78

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Solution

The fourth proportional to 523,069.52, 721,889.08 and 308,278.78 is: 425,456.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,069.52 : 721,889.08 = 308,278.78 : x
  2. Step 2: Convert to fraction form
    523,069.52/721,889.08 = 308,278.78/x
  3. Step 3: Cross multiply
    523,069.52x = 721,889.08 × 308,278.78
  4. Step 4: Simplify right side
    523,069.52x = 222,543,084,877.72
  5. Step 5: Solve for x
    x = 222,543,084,877.72/523,069.52
  6. Step 6: Final answer
    x = 425,456.04

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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.