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Finding the Fourth Proportional to 1,114.26, 1,671.36 and 292.58

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Solution

The fourth proportional to 1,114.26, 1,671.36 and 292.58 is: 438.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.26 : 1,671.36 = 292.58 : x
  2. Step 2: Convert to fraction form
    1,114.26/1,671.36 = 292.58/x
  3. Step 3: Cross multiply
    1,114.26x = 1,671.36 × 292.58
  4. Step 4: Simplify right side
    1,114.26x = 489,006.51
  5. Step 5: Solve for x
    x = 489,006.51/1,114.26
  6. Step 6: Final answer
    x = 438.86

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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.