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Finding the Fourth Proportional to 1,691.25, 2,333.93 and 955.25

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Solution

The fourth proportional to 1,691.25, 2,333.93 and 955.25 is: 1,318.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.25 : 2,333.93 = 955.25 : x
  2. Step 2: Convert to fraction form
    1,691.25/2,333.93 = 955.25/x
  3. Step 3: Cross multiply
    1,691.25x = 2,333.93 × 955.25
  4. Step 4: Simplify right side
    1,691.25x = 2,229,486.63
  5. Step 5: Solve for x
    x = 2,229,486.63/1,691.25
  6. Step 6: Final answer
    x = 1,318.25

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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.