Home / 579,600.10-869,400.15-391,593.70

Finding the Fourth Proportional to 579,600.10, 869,400.15 and 391,593.70

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Solution

The fourth proportional to 579,600.10, 869,400.15 and 391,593.70 is: 587,390.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,600.10 : 869,400.15 = 391,593.70 : x
  2. Step 2: Convert to fraction form
    579,600.10/869,400.15 = 391,593.70/x
  3. Step 3: Cross multiply
    579,600.10x = 869,400.15 × 391,593.70
  4. Step 4: Simplify right side
    579,600.10x = 340,451,621,519.06
  5. Step 5: Solve for x
    x = 340,451,621,519.06/579,600.10
  6. Step 6: Final answer
    x = 587,390.55

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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.