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Finding the Fourth Proportional to 318,315.53, 477,473.57 and 81,658.24

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Solution

The fourth proportional to 318,315.53, 477,473.57 and 81,658.24 is: 122,487.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,315.53 : 477,473.57 = 81,658.24 : x
  2. Step 2: Convert to fraction form
    318,315.53/477,473.57 = 81,658.24/x
  3. Step 3: Cross multiply
    318,315.53x = 477,473.57 × 81,658.24
  4. Step 4: Simplify right side
    318,315.53x = 38,989,651,372.72
  5. Step 5: Solve for x
    x = 38,989,651,372.72/318,315.53
  6. Step 6: Final answer
    x = 122,487.43

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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.