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Finding the Fourth Proportional to 2,391.51, 3,587.30 and 910.75

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Solution

The fourth proportional to 2,391.51, 3,587.30 and 910.75 is: 1,366.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.51 : 3,587.30 = 910.75 : x
  2. Step 2: Convert to fraction form
    2,391.51/3,587.30 = 910.75/x
  3. Step 3: Cross multiply
    2,391.51x = 3,587.30 × 910.75
  4. Step 4: Simplify right side
    2,391.51x = 3,267,133.48
  5. Step 5: Solve for x
    x = 3,267,133.48/2,391.51
  6. Step 6: Final answer
    x = 1,366.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.