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Finding the Fourth Proportional to 912.36, 1,365.30 and 547.32

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Solution

The fourth proportional to 912.36, 1,365.30 and 547.32 is: 819.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.36 : 1,365.30 = 547.32 : x
  2. Step 2: Convert to fraction form
    912.36/1,365.30 = 547.32/x
  3. Step 3: Cross multiply
    912.36x = 1,365.30 × 547.32
  4. Step 4: Simplify right side
    912.36x = 747,256.00
  5. Step 5: Solve for x
    x = 747,256.00/912.36
  6. Step 6: Final answer
    x = 819.04

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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.