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Finding the Fourth Proportional to 1,008.80, 1,509.18 and 873.32

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Solution

The fourth proportional to 1,008.80, 1,509.18 and 873.32 is: 1,306.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.80 : 1,509.18 = 873.32 : x
  2. Step 2: Convert to fraction form
    1,008.80/1,509.18 = 873.32/x
  3. Step 3: Cross multiply
    1,008.80x = 1,509.18 × 873.32
  4. Step 4: Simplify right side
    1,008.80x = 1,317,997.08
  5. Step 5: Solve for x
    x = 1,317,997.08/1,008.80
  6. Step 6: Final answer
    x = 1,306.50

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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.