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Finding the Fourth Proportional to 515,082.80, 772,624.20 and 263,140.40

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Solution

The fourth proportional to 515,082.80, 772,624.20 and 263,140.40 is: 394,710.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,082.80 : 772,624.20 = 263,140.40 : x
  2. Step 2: Convert to fraction form
    515,082.80/772,624.20 = 263,140.40/x
  3. Step 3: Cross multiply
    515,082.80x = 772,624.20 × 263,140.40
  4. Step 4: Simplify right side
    515,082.80x = 203,308,641,037.68
  5. Step 5: Solve for x
    x = 203,308,641,037.68/515,082.80
  6. Step 6: Final answer
    x = 394,710.60

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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.