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Finding the Fourth Proportional to 318,110.40, 477,165.60 and 266,011.20

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Solution

The fourth proportional to 318,110.40, 477,165.60 and 266,011.20 is: 399,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,110.40 : 477,165.60 = 266,011.20 : x
  2. Step 2: Convert to fraction form
    318,110.40/477,165.60 = 266,011.20/x
  3. Step 3: Cross multiply
    318,110.40x = 477,165.60 × 266,011.20
  4. Step 4: Simplify right side
    318,110.40x = 126,931,393,854.72
  5. Step 5: Solve for x
    x = 126,931,393,854.72/318,110.40
  6. Step 6: Final answer
    x = 399,016.80

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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.