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Finding the Fourth Proportional to 1,691.07, 2,332.94 and 992.13

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Solution

The fourth proportional to 1,691.07, 2,332.94 and 992.13 is: 1,368.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.07 : 2,332.94 = 992.13 : x
  2. Step 2: Convert to fraction form
    1,691.07/2,332.94 = 992.13/x
  3. Step 3: Cross multiply
    1,691.07x = 2,332.94 × 992.13
  4. Step 4: Simplify right side
    1,691.07x = 2,314,574.80
  5. Step 5: Solve for x
    x = 2,314,574.80/1,691.07
  6. Step 6: Final answer
    x = 1,368.70

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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.