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Finding the Fourth Proportional to 1,557.82, 2,337 and 447.40

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Solution

The fourth proportional to 1,557.82, 2,337 and 447.40 is: 671.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.82 : 2,337 = 447.40 : x
  2. Step 2: Convert to fraction form
    1,557.82/2,337 = 447.40/x
  3. Step 3: Cross multiply
    1,557.82x = 2,337 × 447.40
  4. Step 4: Simplify right side
    1,557.82x = 1,045,573.80
  5. Step 5: Solve for x
    x = 1,045,573.80/1,557.82
  6. Step 6: Final answer
    x = 671.18

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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.