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Finding the Fourth Proportional to 279,108.27, 385,165.80 and 151,781.13

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Solution

The fourth proportional to 279,108.27, 385,165.80 and 151,781.13 is: 209,455.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,108.27 : 385,165.80 = 151,781.13 : x
  2. Step 2: Convert to fraction form
    279,108.27/385,165.80 = 151,781.13/x
  3. Step 3: Cross multiply
    279,108.27x = 385,165.80 × 151,781.13
  4. Step 4: Simplify right side
    279,108.27x = 58,460,900,361.35
  5. Step 5: Solve for x
    x = 58,460,900,361.35/279,108.27
  6. Step 6: Final answer
    x = 209,455.99

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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.