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Finding the Fourth Proportional to 1,218.52, 1,677.42 and 923.32

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Solution

The fourth proportional to 1,218.52, 1,677.42 and 923.32 is: 1,271.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.52 : 1,677.42 = 923.32 : x
  2. Step 2: Convert to fraction form
    1,218.52/1,677.42 = 923.32/x
  3. Step 3: Cross multiply
    1,218.52x = 1,677.42 × 923.32
  4. Step 4: Simplify right side
    1,218.52x = 1,548,795.43
  5. Step 5: Solve for x
    x = 1,548,795.43/1,218.52
  6. Step 6: Final answer
    x = 1,271.05

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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.