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Finding the Fourth Proportional to 1,271.52, 1,906.86 and 655.14

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Solution

The fourth proportional to 1,271.52, 1,906.86 and 655.14 is: 982.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.52 : 1,906.86 = 655.14 : x
  2. Step 2: Convert to fraction form
    1,271.52/1,906.86 = 655.14/x
  3. Step 3: Cross multiply
    1,271.52x = 1,906.86 × 655.14
  4. Step 4: Simplify right side
    1,271.52x = 1,249,260.26
  5. Step 5: Solve for x
    x = 1,249,260.26/1,271.52
  6. Step 6: Final answer
    x = 982.49

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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.