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Finding the Fourth Proportional to 749.13, 1,034.40 and 539.74

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Solution

The fourth proportional to 749.13, 1,034.40 and 539.74 is: 745.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.13 : 1,034.40 = 539.74 : x
  2. Step 2: Convert to fraction form
    749.13/1,034.40 = 539.74/x
  3. Step 3: Cross multiply
    749.13x = 1,034.40 × 539.74
  4. Step 4: Simplify right side
    749.13x = 558,307.06
  5. Step 5: Solve for x
    x = 558,307.06/749.13
  6. Step 6: Final answer
    x = 745.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.