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Finding the Fourth Proportional to 984.30, 1,358.82 and 671.19

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Solution

The fourth proportional to 984.30, 1,358.82 and 671.19 is: 926.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.30 : 1,358.82 = 671.19 : x
  2. Step 2: Convert to fraction form
    984.30/1,358.82 = 671.19/x
  3. Step 3: Cross multiply
    984.30x = 1,358.82 × 671.19
  4. Step 4: Simplify right side
    984.30x = 912,026.40
  5. Step 5: Solve for x
    x = 912,026.40/984.30
  6. Step 6: Final answer
    x = 926.57

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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.