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Finding the Fourth Proportional to 665,520.30, 918,581.22 and 379,209.24

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Solution

The fourth proportional to 665,520.30, 918,581.22 and 379,209.24 is: 523,401.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,520.30 : 918,581.22 = 379,209.24 : x
  2. Step 2: Convert to fraction form
    665,520.30/918,581.22 = 379,209.24/x
  3. Step 3: Cross multiply
    665,520.30x = 918,581.22 × 379,209.24
  4. Step 4: Simplify right side
    665,520.30x = 348,334,486,314.47
  5. Step 5: Solve for x
    x = 348,334,486,314.47/665,520.30
  6. Step 6: Final answer
    x = 523,401.74

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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.