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Finding the Fourth Proportional to 955.02, 1,316.25 and 821.91

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Solution

The fourth proportional to 955.02, 1,316.25 and 821.91 is: 1,132.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.02 : 1,316.25 = 821.91 : x
  2. Step 2: Convert to fraction form
    955.02/1,316.25 = 821.91/x
  3. Step 3: Cross multiply
    955.02x = 1,316.25 × 821.91
  4. Step 4: Simplify right side
    955.02x = 1,081,836.57
  5. Step 5: Solve for x
    x = 1,081,836.57/955.02
  6. Step 6: Final answer
    x = 1,132.79

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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.