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Finding the Fourth Proportional to 958.40, 1,322.20 and 585.32

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Solution

The fourth proportional to 958.40, 1,322.20 and 585.32 is: 807.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.40 : 1,322.20 = 585.32 : x
  2. Step 2: Convert to fraction form
    958.40/1,322.20 = 585.32/x
  3. Step 3: Cross multiply
    958.40x = 1,322.20 × 585.32
  4. Step 4: Simplify right side
    958.40x = 773,910.10
  5. Step 5: Solve for x
    x = 773,910.10/958.40
  6. Step 6: Final answer
    x = 807.50

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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.