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Finding the Fourth Proportional to 1,436.87, 2,151.05 and 887.29

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Solution

The fourth proportional to 1,436.87, 2,151.05 and 887.29 is: 1,328.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,436.87 : 2,151.05 = 887.29 : x
  2. Step 2: Convert to fraction form
    1,436.87/2,151.05 = 887.29/x
  3. Step 3: Cross multiply
    1,436.87x = 2,151.05 × 887.29
  4. Step 4: Simplify right side
    1,436.87x = 1,908,594.40
  5. Step 5: Solve for x
    x = 1,908,594.40/1,436.87
  6. Step 6: Final answer
    x = 1,328.30

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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.