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Finding the Fourth Proportional to 520,053.20, 780,079.80 and 283,857.20

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Solution

The fourth proportional to 520,053.20, 780,079.80 and 283,857.20 is: 425,785.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,053.20 : 780,079.80 = 283,857.20 : x
  2. Step 2: Convert to fraction form
    520,053.20/780,079.80 = 283,857.20/x
  3. Step 3: Cross multiply
    520,053.20x = 780,079.80 × 283,857.20
  4. Step 4: Simplify right side
    520,053.20x = 221,431,267,804.56
  5. Step 5: Solve for x
    x = 221,431,267,804.56/520,053.20
  6. Step 6: Final answer
    x = 425,785.80

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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.