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Finding the Fourth Proportional to 1,158.25, 1,599.12 and 716.40

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Solution

The fourth proportional to 1,158.25, 1,599.12 and 716.40 is: 989.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.25 : 1,599.12 = 716.40 : x
  2. Step 2: Convert to fraction form
    1,158.25/1,599.12 = 716.40/x
  3. Step 3: Cross multiply
    1,158.25x = 1,599.12 × 716.40
  4. Step 4: Simplify right side
    1,158.25x = 1,145,609.57
  5. Step 5: Solve for x
    x = 1,145,609.57/1,158.25
  6. Step 6: Final answer
    x = 989.09

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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.