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Finding the Fourth Proportional to 318,597.20, 477,961.14 and 266,371.64

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Solution

The fourth proportional to 318,597.20, 477,961.14 and 266,371.64 is: 399,612.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,597.20 : 477,961.14 = 266,371.64 : x
  2. Step 2: Convert to fraction form
    318,597.20/477,961.14 = 266,371.64/x
  3. Step 3: Cross multiply
    318,597.20x = 477,961.14 × 266,371.64
  4. Step 4: Simplify right side
    318,597.20x = 127,315,292,718.07
  5. Step 5: Solve for x
    x = 127,315,292,718.07/318,597.20
  6. Step 6: Final answer
    x = 399,612.09

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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.