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Finding the Fourth Proportional to 2,117.95, 3,177.35 and 731.34

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Solution

The fourth proportional to 2,117.95, 3,177.35 and 731.34 is: 1,097.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.95 : 3,177.35 = 731.34 : x
  2. Step 2: Convert to fraction form
    2,117.95/3,177.35 = 731.34/x
  3. Step 3: Cross multiply
    2,117.95x = 3,177.35 × 731.34
  4. Step 4: Simplify right side
    2,117.95x = 2,323,710.32
  5. Step 5: Solve for x
    x = 2,323,710.32/2,117.95
  6. Step 6: Final answer
    x = 1,097.15

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1.5x scale

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.