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Finding the Fourth Proportional to 687,475.36, 948,701.72 and 381,533.97

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Solution

The fourth proportional to 687,475.36, 948,701.72 and 381,533.97 is: 526,508.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,475.36 : 948,701.72 = 381,533.97 : x
  2. Step 2: Convert to fraction form
    687,475.36/948,701.72 = 381,533.97/x
  3. Step 3: Cross multiply
    687,475.36x = 948,701.72 × 381,533.97
  4. Step 4: Simplify right side
    687,475.36x = 361,961,934,531.26
  5. Step 5: Solve for x
    x = 361,961,934,531.26/687,475.36
  6. Step 6: Final answer
    x = 526,508.96

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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.