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Finding the Fourth Proportional to 749.36, 1,123.58 and 359.48

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Solution

The fourth proportional to 749.36, 1,123.58 and 359.48 is: 538.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.36 : 1,123.58 = 359.48 : x
  2. Step 2: Convert to fraction form
    749.36/1,123.58 = 359.48/x
  3. Step 3: Cross multiply
    749.36x = 1,123.58 × 359.48
  4. Step 4: Simplify right side
    749.36x = 403,897.12
  5. Step 5: Solve for x
    x = 403,897.12/749.36
  6. Step 6: Final answer
    x = 538.99

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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.