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Finding the Fourth Proportional to 687,482, 948,710.88 and 381,540.62

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Solution

The fourth proportional to 687,482, 948,710.88 and 381,540.62 is: 526,518.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,482 : 948,710.88 = 381,540.62 : x
  2. Step 2: Convert to fraction form
    687,482/948,710.88 = 381,540.62/x
  3. Step 3: Cross multiply
    687,482x = 948,710.88 × 381,540.62
  4. Step 4: Simplify right side
    687,482x = 361,971,737,355.95
  5. Step 5: Solve for x
    x = 361,971,737,355.95/687,482
  6. Step 6: Final answer
    x = 526,518.13

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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.