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Finding the Fourth Proportional to 1,114.29, 1,671.45 and 292.64

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Solution

The fourth proportional to 1,114.29, 1,671.45 and 292.64 is: 438.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.29 : 1,671.45 = 292.64 : x
  2. Step 2: Convert to fraction form
    1,114.29/1,671.45 = 292.64/x
  3. Step 3: Cross multiply
    1,114.29x = 1,671.45 × 292.64
  4. Step 4: Simplify right side
    1,114.29x = 489,131.66
  5. Step 5: Solve for x
    x = 489,131.66/1,114.29
  6. Step 6: Final answer
    x = 438.96

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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.