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Finding the Fourth Proportional to 520,089.20, 780,133.80 and 283,893.20

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Solution

The fourth proportional to 520,089.20, 780,133.80 and 283,893.20 is: 425,839.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,089.20 : 780,133.80 = 283,893.20 : x
  2. Step 2: Convert to fraction form
    520,089.20/780,133.80 = 283,893.20/x
  3. Step 3: Cross multiply
    520,089.20x = 780,133.80 × 283,893.20
  4. Step 4: Simplify right side
    520,089.20x = 221,474,680,910.16
  5. Step 5: Solve for x
    x = 221,474,680,910.16/520,089.20
  6. Step 6: Final answer
    x = 425,839.80

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Similar ratio
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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.