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Finding the Fourth Proportional to 1,697.11, 2,341.56 and 979.11

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Solution

The fourth proportional to 1,697.11, 2,341.56 and 979.11 is: 1,350.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,697.11 : 2,341.56 = 979.11 : x
  2. Step 2: Convert to fraction form
    1,697.11/2,341.56 = 979.11/x
  3. Step 3: Cross multiply
    1,697.11x = 2,341.56 × 979.11
  4. Step 4: Simplify right side
    1,697.11x = 2,292,644.81
  5. Step 5: Solve for x
    x = 2,292,644.81/1,697.11
  6. Step 6: Final answer
    x = 1,350.91

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1.5x scale

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.