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Finding the Fourth Proportional to 1,132.87, 1,696.80 and 870.95

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Solution

The fourth proportional to 1,132.87, 1,696.80 and 870.95 is: 1,304.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.87 : 1,696.80 = 870.95 : x
  2. Step 2: Convert to fraction form
    1,132.87/1,696.80 = 870.95/x
  3. Step 3: Cross multiply
    1,132.87x = 1,696.80 × 870.95
  4. Step 4: Simplify right side
    1,132.87x = 1,477,827.96
  5. Step 5: Solve for x
    x = 1,477,827.96/1,132.87
  6. Step 6: Final answer
    x = 1,304.50

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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.