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Finding the Fourth Proportional to 687,310.76, 948,494.22 and 381,388.34

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Solution

The fourth proportional to 687,310.76, 948,494.22 and 381,388.34 is: 526,318.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,310.76 : 948,494.22 = 381,388.34 : x
  2. Step 2: Convert to fraction form
    687,310.76/948,494.22 = 381,388.34/x
  3. Step 3: Cross multiply
    687,310.76x = 948,494.22 × 381,388.34
  4. Step 4: Simplify right side
    687,310.76x = 361,744,636,065.40
  5. Step 5: Solve for x
    x = 361,744,636,065.40/687,310.76
  6. Step 6: Final answer
    x = 526,318.89

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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.