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Finding the Fourth Proportional to 1,732.96, 2,391.66 and 987.05

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Solution

The fourth proportional to 1,732.96, 2,391.66 and 987.05 is: 1,362.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,732.96 : 2,391.66 = 987.05 : x
  2. Step 2: Convert to fraction form
    1,732.96/2,391.66 = 987.05/x
  3. Step 3: Cross multiply
    1,732.96x = 2,391.66 × 987.05
  4. Step 4: Simplify right side
    1,732.96x = 2,360,688.00
  5. Step 5: Solve for x
    x = 2,360,688.00/1,732.96
  6. Step 6: Final answer
    x = 1,362.23

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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.