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Finding the Fourth Proportional to 749.40, 1,124.85 and 554.58

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Solution

The fourth proportional to 749.40, 1,124.85 and 554.58 is: 832.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.40 : 1,124.85 = 554.58 : x
  2. Step 2: Convert to fraction form
    749.40/1,124.85 = 554.58/x
  3. Step 3: Cross multiply
    749.40x = 1,124.85 × 554.58
  4. Step 4: Simplify right side
    749.40x = 623,819.31
  5. Step 5: Solve for x
    x = 623,819.31/749.40
  6. Step 6: Final answer
    x = 832.43

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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.