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Finding the Fourth Proportional to 1,330.53, 1,836.35 and 958.74

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Solution

The fourth proportional to 1,330.53, 1,836.35 and 958.74 is: 1,323.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.53 : 1,836.35 = 958.74 : x
  2. Step 2: Convert to fraction form
    1,330.53/1,836.35 = 958.74/x
  3. Step 3: Cross multiply
    1,330.53x = 1,836.35 × 958.74
  4. Step 4: Simplify right side
    1,330.53x = 1,760,577.41
  5. Step 5: Solve for x
    x = 1,760,577.41/1,330.53
  6. Step 6: Final answer
    x = 1,323.22

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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.