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Finding the Fourth Proportional to 519,253.20, 778,879.80 and 283,057.20

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Solution

The fourth proportional to 519,253.20, 778,879.80 and 283,057.20 is: 424,585.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,253.20 : 778,879.80 = 283,057.20 : x
  2. Step 2: Convert to fraction form
    519,253.20/778,879.80 = 283,057.20/x
  3. Step 3: Cross multiply
    519,253.20x = 778,879.80 × 283,057.20
  4. Step 4: Simplify right side
    519,253.20x = 220,467,535,324.56
  5. Step 5: Solve for x
    x = 220,467,535,324.56/519,253.20
  6. Step 6: Final answer
    x = 424,585.80

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Double scale
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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.