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Finding the Fourth Proportional to 331,098.71, 457,377.23 and 318,808.98

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Solution

The fourth proportional to 331,098.71, 457,377.23 and 318,808.98 is: 440,400.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,098.71 : 457,377.23 = 318,808.98 : x
  2. Step 2: Convert to fraction form
    331,098.71/457,377.23 = 318,808.98/x
  3. Step 3: Cross multiply
    331,098.71x = 457,377.23 × 318,808.98
  4. Step 4: Simplify right side
    331,098.71x = 145,815,968,968.55
  5. Step 5: Solve for x
    x = 145,815,968,968.55/331,098.71
  6. Step 6: Final answer
    x = 440,400.30

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1.5x scale

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.