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Finding the Fourth Proportional to 689,057.38, 951,159 and 402,670.54

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Solution

The fourth proportional to 689,057.38, 951,159 and 402,670.54 is: 555,837.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,057.38 : 951,159 = 402,670.54 : x
  2. Step 2: Convert to fraction form
    689,057.38/951,159 = 402,670.54/x
  3. Step 3: Cross multiply
    689,057.38x = 951,159 × 402,670.54
  4. Step 4: Simplify right side
    689,057.38x = 383,003,708,155.86
  5. Step 5: Solve for x
    x = 383,003,708,155.86/689,057.38
  6. Step 6: Final answer
    x = 555,837.18

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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.