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Finding the Fourth Proportional to 1,230.68, 1,698.28 and 671.13

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Solution

The fourth proportional to 1,230.68, 1,698.28 and 671.13 is: 926.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.68 : 1,698.28 = 671.13 : x
  2. Step 2: Convert to fraction form
    1,230.68/1,698.28 = 671.13/x
  3. Step 3: Cross multiply
    1,230.68x = 1,698.28 × 671.13
  4. Step 4: Simplify right side
    1,230.68x = 1,139,766.66
  5. Step 5: Solve for x
    x = 1,139,766.66/1,230.68
  6. Step 6: Final answer
    x = 926.13

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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.