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Finding the Fourth Proportional to 749.24, 1,123.72 and 507.32

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Solution

The fourth proportional to 749.24, 1,123.72 and 507.32 is: 760.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.24 : 1,123.72 = 507.32 : x
  2. Step 2: Convert to fraction form
    749.24/1,123.72 = 507.32/x
  3. Step 3: Cross multiply
    749.24x = 1,123.72 × 507.32
  4. Step 4: Simplify right side
    749.24x = 570,085.63
  5. Step 5: Solve for x
    x = 570,085.63/749.24
  6. Step 6: Final answer
    x = 760.89

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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.