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Finding the Fourth Proportional to 318,219.60, 477,318.60 and 81,564.60

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Solution

The fourth proportional to 318,219.60, 477,318.60 and 81,564.60 is: 122,344.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,219.60 : 477,318.60 = 81,564.60 : x
  2. Step 2: Convert to fraction form
    318,219.60/477,318.60 = 81,564.60/x
  3. Step 3: Cross multiply
    318,219.60x = 477,318.60 × 81,564.60
  4. Step 4: Simplify right side
    318,219.60x = 38,932,300,681.56
  5. Step 5: Solve for x
    x = 38,932,300,681.56/318,219.60
  6. Step 6: Final answer
    x = 122,344.13

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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.