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Finding the Fourth Proportional to 520,742.88, 781,108.56 and 126,758.88

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Solution

The fourth proportional to 520,742.88, 781,108.56 and 126,758.88 is: 190,136.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,742.88 : 781,108.56 = 126,758.88 : x
  2. Step 2: Convert to fraction form
    520,742.88/781,108.56 = 126,758.88/x
  3. Step 3: Cross multiply
    520,742.88x = 781,108.56 × 126,758.88
  4. Step 4: Simplify right side
    520,742.88x = 99,012,446,224.01
  5. Step 5: Solve for x
    x = 99,012,446,224.01/520,742.88
  6. Step 6: Final answer
    x = 190,136.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.