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Finding the Fourth Proportional to 689,704.29, 951,479.30 and 498,414.69

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Solution

The fourth proportional to 689,704.29, 951,479.30 and 498,414.69 is: 687,586.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,704.29 : 951,479.30 = 498,414.69 : x
  2. Step 2: Convert to fraction form
    689,704.29/951,479.30 = 498,414.69/x
  3. Step 3: Cross multiply
    689,704.29x = 951,479.30 × 498,414.69
  4. Step 4: Simplify right side
    689,704.29x = 474,231,257,858.84
  5. Step 5: Solve for x
    x = 474,231,257,858.84/689,704.29
  6. Step 6: Final answer
    x = 687,586.35

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Double scale
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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.