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Finding the Fourth Proportional to 519,243.20, 778,864.80 and 283,047.20

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Solution

The fourth proportional to 519,243.20, 778,864.80 and 283,047.20 is: 424,570.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,243.20 : 778,864.80 = 283,047.20 : x
  2. Step 2: Convert to fraction form
    519,243.20/778,864.80 = 283,047.20/x
  3. Step 3: Cross multiply
    519,243.20x = 778,864.80 × 283,047.20
  4. Step 4: Simplify right side
    519,243.20x = 220,455,500,818.56
  5. Step 5: Solve for x
    x = 220,455,500,818.56/519,243.20
  6. Step 6: Final answer
    x = 424,570.80

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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.