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Finding the Fourth Proportional to 318,062.40, 477,093.60 and 265,963.20

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Solution

The fourth proportional to 318,062.40, 477,093.60 and 265,963.20 is: 398,944.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,062.40 : 477,093.60 = 265,963.20 : x
  2. Step 2: Convert to fraction form
    318,062.40/477,093.60 = 265,963.20/x
  3. Step 3: Cross multiply
    318,062.40x = 477,093.60 × 265,963.20
  4. Step 4: Simplify right side
    318,062.40x = 126,889,340,555.52
  5. Step 5: Solve for x
    x = 126,889,340,555.52/318,062.40
  6. Step 6: Final answer
    x = 398,944.80

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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.