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Finding the Fourth Proportional to 579,503.60, 869,255.40 and 391,497.20

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Solution

The fourth proportional to 579,503.60, 869,255.40 and 391,497.20 is: 587,245.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,503.60 : 869,255.40 = 391,497.20 : x
  2. Step 2: Convert to fraction form
    579,503.60/869,255.40 = 391,497.20/x
  3. Step 3: Cross multiply
    579,503.60x = 869,255.40 × 391,497.20
  4. Step 4: Simplify right side
    579,503.60x = 340,311,055,184.88
  5. Step 5: Solve for x
    x = 340,311,055,184.88/579,503.60
  6. Step 6: Final answer
    x = 587,245.80

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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.