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Finding the Fourth Proportional to 912.53, 1,370.19 and 548.93

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Solution

The fourth proportional to 912.53, 1,370.19 and 548.93 is: 824.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.53 : 1,370.19 = 548.93 : x
  2. Step 2: Convert to fraction form
    912.53/1,370.19 = 548.93/x
  3. Step 3: Cross multiply
    912.53x = 1,370.19 × 548.93
  4. Step 4: Simplify right side
    912.53x = 752,138.40
  5. Step 5: Solve for x
    x = 752,138.40/912.53
  6. Step 6: Final answer
    x = 824.23

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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.