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Finding the Fourth Proportional to 1,088.76, 1,639.25 and 959.56

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Solution

The fourth proportional to 1,088.76, 1,639.25 and 959.56 is: 1,444.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,088.76 : 1,639.25 = 959.56 : x
  2. Step 2: Convert to fraction form
    1,088.76/1,639.25 = 959.56/x
  3. Step 3: Cross multiply
    1,088.76x = 1,639.25 × 959.56
  4. Step 4: Simplify right side
    1,088.76x = 1,572,968.05
  5. Step 5: Solve for x
    x = 1,572,968.05/1,088.76
  6. Step 6: Final answer
    x = 1,444.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.