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Finding the Fourth Proportional to 318,909.60, 477,442.80 and 194,493.60

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Solution

The fourth proportional to 318,909.60, 477,442.80 and 194,493.60 is: 291,178.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,909.60 : 477,442.80 = 194,493.60 : x
  2. Step 2: Convert to fraction form
    318,909.60/477,442.80 = 194,493.60/x
  3. Step 3: Cross multiply
    318,909.60x = 477,442.80 × 194,493.60
  4. Step 4: Simplify right side
    318,909.60x = 92,859,568,966.08
  5. Step 5: Solve for x
    x = 92,859,568,966.08/318,909.60
  6. Step 6: Final answer
    x = 291,178.34

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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.