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Finding the Fourth Proportional to 1,691.95, 2,334.87 and 945.89

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Solution

The fourth proportional to 1,691.95, 2,334.87 and 945.89 is: 1,305.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.95 : 2,334.87 = 945.89 : x
  2. Step 2: Convert to fraction form
    1,691.95/2,334.87 = 945.89/x
  3. Step 3: Cross multiply
    1,691.95x = 2,334.87 × 945.89
  4. Step 4: Simplify right side
    1,691.95x = 2,208,530.18
  5. Step 5: Solve for x
    x = 2,208,530.18/1,691.95
  6. Step 6: Final answer
    x = 1,305.32

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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.