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Finding the Fourth Proportional to 1,691.99, 2,337.89 and 1,396.74

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Solution

The fourth proportional to 1,691.99, 2,337.89 and 1,396.74 is: 1,929.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.99 : 2,337.89 = 1,396.74 : x
  2. Step 2: Convert to fraction form
    1,691.99/2,337.89 = 1,396.74/x
  3. Step 3: Cross multiply
    1,691.99x = 2,337.89 × 1,396.74
  4. Step 4: Simplify right side
    1,691.99x = 3,265,417.49
  5. Step 5: Solve for x
    x = 3,265,417.49/1,691.99
  6. Step 6: Final answer
    x = 1,929.93

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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.