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Finding the Fourth Proportional to 1,158.32, 1,596.88 and 958.40

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Solution

The fourth proportional to 1,158.32, 1,596.88 and 958.40 is: 1,321.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.32 : 1,596.88 = 958.40 : x
  2. Step 2: Convert to fraction form
    1,158.32/1,596.88 = 958.40/x
  3. Step 3: Cross multiply
    1,158.32x = 1,596.88 × 958.40
  4. Step 4: Simplify right side
    1,158.32x = 1,530,449.79
  5. Step 5: Solve for x
    x = 1,530,449.79/1,158.32
  6. Step 6: Final answer
    x = 1,321.27

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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.