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Finding the Fourth Proportional to 579,608.10, 869,412.15 and 391,601.70

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Solution

The fourth proportional to 579,608.10, 869,412.15 and 391,601.70 is: 587,402.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,608.10 : 869,412.15 = 391,601.70 : x
  2. Step 2: Convert to fraction form
    579,608.10/869,412.15 = 391,601.70/x
  3. Step 3: Cross multiply
    579,608.10x = 869,412.15 × 391,601.70
  4. Step 4: Simplify right side
    579,608.10x = 340,463,275,940.66
  5. Step 5: Solve for x
    x = 340,463,275,940.66/579,608.10
  6. Step 6: Final answer
    x = 587,402.55

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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.