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Finding the Fourth Proportional to 749.66, 1,125.21 and 365.18

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Solution

The fourth proportional to 749.66, 1,125.21 and 365.18 is: 548.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.66 : 1,125.21 = 365.18 : x
  2. Step 2: Convert to fraction form
    749.66/1,125.21 = 365.18/x
  3. Step 3: Cross multiply
    749.66x = 1,125.21 × 365.18
  4. Step 4: Simplify right side
    749.66x = 410,904.19
  5. Step 5: Solve for x
    x = 410,904.19/749.66
  6. Step 6: Final answer
    x = 548.12

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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.