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Finding the Fourth Proportional to 689,358.94, 951,301.67 and 383,428.76

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Solution

The fourth proportional to 689,358.94, 951,301.67 and 383,428.76 is: 529,124.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,358.94 : 951,301.67 = 383,428.76 : x
  2. Step 2: Convert to fraction form
    689,358.94/951,301.67 = 383,428.76/x
  3. Step 3: Cross multiply
    689,358.94x = 951,301.67 × 383,428.76
  4. Step 4: Simplify right side
    689,358.94x = 364,756,413,040.38
  5. Step 5: Solve for x
    x = 364,756,413,040.38/689,358.94
  6. Step 6: Final answer
    x = 529,124.08

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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.