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Finding the Fourth Proportional to 515,518.40, 773,277.60 and 347,119.40

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Solution

The fourth proportional to 515,518.40, 773,277.60 and 347,119.40 is: 520,679.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,518.40 : 773,277.60 = 347,119.40 : x
  2. Step 2: Convert to fraction form
    515,518.40/773,277.60 = 347,119.40/x
  3. Step 3: Cross multiply
    515,518.40x = 773,277.60 × 347,119.40
  4. Step 4: Simplify right side
    515,518.40x = 268,419,656,545.44
  5. Step 5: Solve for x
    x = 268,419,656,545.44/515,518.40
  6. Step 6: Final answer
    x = 520,679.10

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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.