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Finding the Fourth Proportional to 1,121.02, 1,546.78 and 655.18

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Solution

The fourth proportional to 1,121.02, 1,546.78 and 655.18 is: 904.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.02 : 1,546.78 = 655.18 : x
  2. Step 2: Convert to fraction form
    1,121.02/1,546.78 = 655.18/x
  3. Step 3: Cross multiply
    1,121.02x = 1,546.78 × 655.18
  4. Step 4: Simplify right side
    1,121.02x = 1,013,419.32
  5. Step 5: Solve for x
    x = 1,013,419.32/1,121.02
  6. Step 6: Final answer
    x = 904.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.