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Finding the Fourth Proportional to 1,041.06, 1,436.90 and 687.04

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Solution

The fourth proportional to 1,041.06, 1,436.90 and 687.04 is: 948.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.06 : 1,436.90 = 687.04 : x
  2. Step 2: Convert to fraction form
    1,041.06/1,436.90 = 687.04/x
  3. Step 3: Cross multiply
    1,041.06x = 1,436.90 × 687.04
  4. Step 4: Simplify right side
    1,041.06x = 987,207.78
  5. Step 5: Solve for x
    x = 987,207.78/1,041.06
  6. Step 6: Final answer
    x = 948.27

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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.