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Finding the Fourth Proportional to 687,484.20, 948,713.88 and 381,542.76

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Solution

The fourth proportional to 687,484.20, 948,713.88 and 381,542.76 is: 526,521.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,484.20 : 948,713.88 = 381,542.76 : x
  2. Step 2: Convert to fraction form
    687,484.20/948,713.88 = 381,542.76/x
  3. Step 3: Cross multiply
    687,484.20x = 948,713.88 × 381,542.76
  4. Step 4: Simplify right side
    687,484.20x = 361,974,912,225.51
  5. Step 5: Solve for x
    x = 361,974,912,225.51/687,484.20
  6. Step 6: Final answer
    x = 526,521.06

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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.