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Finding the Fourth Proportional to 513,040.80, 769,561.20 and 371,323.20

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Solution

The fourth proportional to 513,040.80, 769,561.20 and 371,323.20 is: 556,984.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,040.80 : 769,561.20 = 371,323.20 : x
  2. Step 2: Convert to fraction form
    513,040.80/769,561.20 = 371,323.20/x
  3. Step 3: Cross multiply
    513,040.80x = 769,561.20 × 371,323.20
  4. Step 4: Simplify right side
    513,040.80x = 285,755,927,379.84
  5. Step 5: Solve for x
    x = 285,755,927,379.84/513,040.80
  6. Step 6: Final answer
    x = 556,984.80

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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.