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Finding the Fourth Proportional to 958.04, 1,322.70 and 663.20

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Solution

The fourth proportional to 958.04, 1,322.70 and 663.20 is: 915.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.04 : 1,322.70 = 663.20 : x
  2. Step 2: Convert to fraction form
    958.04/1,322.70 = 663.20/x
  3. Step 3: Cross multiply
    958.04x = 1,322.70 × 663.20
  4. Step 4: Simplify right side
    958.04x = 877,214.64
  5. Step 5: Solve for x
    x = 877,214.64/958.04
  6. Step 6: Final answer
    x = 915.63

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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.