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Finding the Fourth Proportional to 986.32, 1,479.58 and 552.56

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Solution

The fourth proportional to 986.32, 1,479.58 and 552.56 is: 828.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.32 : 1,479.58 = 552.56 : x
  2. Step 2: Convert to fraction form
    986.32/1,479.58 = 552.56/x
  3. Step 3: Cross multiply
    986.32x = 1,479.58 × 552.56
  4. Step 4: Simplify right side
    986.32x = 817,559.04
  5. Step 5: Solve for x
    x = 817,559.04/986.32
  6. Step 6: Final answer
    x = 828.90

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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.