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Finding the Fourth Proportional to 912.11, 1,368.18 and 546.08

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Solution

The fourth proportional to 912.11, 1,368.18 and 546.08 is: 819.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.11 : 1,368.18 = 546.08 : x
  2. Step 2: Convert to fraction form
    912.11/1,368.18 = 546.08/x
  3. Step 3: Cross multiply
    912.11x = 1,368.18 × 546.08
  4. Step 4: Simplify right side
    912.11x = 747,128.89
  5. Step 5: Solve for x
    x = 747,128.89/912.11
  6. Step 6: Final answer
    x = 819.13

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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.