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Finding the Fourth Proportional to 474,687.52, 655,780.26 and 311,730.64

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Solution

The fourth proportional to 474,687.52, 655,780.26 and 311,730.64 is: 430,655.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,687.52 : 655,780.26 = 311,730.64 : x
  2. Step 2: Convert to fraction form
    474,687.52/655,780.26 = 311,730.64/x
  3. Step 3: Cross multiply
    474,687.52x = 655,780.26 × 311,730.64
  4. Step 4: Simplify right side
    474,687.52x = 204,426,800,149.17
  5. Step 5: Solve for x
    x = 204,426,800,149.17/474,687.52
  6. Step 6: Final answer
    x = 430,655.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.