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Finding the Fourth Proportional to 1,034.76, 1,419.22 and 918.12

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Solution

The fourth proportional to 1,034.76, 1,419.22 and 918.12 is: 1,259.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.76 : 1,419.22 = 918.12 : x
  2. Step 2: Convert to fraction form
    1,034.76/1,419.22 = 918.12/x
  3. Step 3: Cross multiply
    1,034.76x = 1,419.22 × 918.12
  4. Step 4: Simplify right side
    1,034.76x = 1,303,014.27
  5. Step 5: Solve for x
    x = 1,303,014.27/1,034.76
  6. Step 6: Final answer
    x = 1,259.24

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.