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Finding the Fourth Proportional to 529,699.92, 731,000.30 and 287,998.76

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Solution

The fourth proportional to 529,699.92, 731,000.30 and 287,998.76 is: 397,446.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,699.92 : 731,000.30 = 287,998.76 : x
  2. Step 2: Convert to fraction form
    529,699.92/731,000.30 = 287,998.76/x
  3. Step 3: Cross multiply
    529,699.92x = 731,000.30 × 287,998.76
  4. Step 4: Simplify right side
    529,699.92x = 210,527,179,959.63
  5. Step 5: Solve for x
    x = 210,527,179,959.63/529,699.92
  6. Step 6: Final answer
    x = 397,446.12

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Double scale
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Similar ratio
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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.