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Finding the Fourth Proportional to 2,071.38, 3,107.13 and 917.13

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Solution

The fourth proportional to 2,071.38, 3,107.13 and 917.13 is: 1,375.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,071.38 : 3,107.13 = 917.13 : x
  2. Step 2: Convert to fraction form
    2,071.38/3,107.13 = 917.13/x
  3. Step 3: Cross multiply
    2,071.38x = 3,107.13 × 917.13
  4. Step 4: Simplify right side
    2,071.38x = 2,849,642.14
  5. Step 5: Solve for x
    x = 2,849,642.14/2,071.38
  6. Step 6: Final answer
    x = 1,375.72

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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.