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Finding the Fourth Proportional to 665,753.20, 918,732.52 and 379,279.44

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Solution

The fourth proportional to 665,753.20, 918,732.52 and 379,279.44 is: 523,401.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,753.20 : 918,732.52 = 379,279.44 : x
  2. Step 2: Convert to fraction form
    665,753.20/918,732.52 = 379,279.44/x
  3. Step 3: Cross multiply
    665,753.20x = 918,732.52 × 379,279.44
  4. Step 4: Simplify right side
    665,753.20x = 348,456,355,695.39
  5. Step 5: Solve for x
    x = 348,456,355,695.39/665,753.20
  6. Step 6: Final answer
    x = 523,401.70

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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.