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Finding the Fourth Proportional to 912.94, 1,371.75 and 528.46

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Solution

The fourth proportional to 912.94, 1,371.75 and 528.46 is: 794.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.94 : 1,371.75 = 528.46 : x
  2. Step 2: Convert to fraction form
    912.94/1,371.75 = 528.46/x
  3. Step 3: Cross multiply
    912.94x = 1,371.75 × 528.46
  4. Step 4: Simplify right side
    912.94x = 724,915.01
  5. Step 5: Solve for x
    x = 724,915.01/912.94
  6. Step 6: Final answer
    x = 794.04

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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.