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Finding the Fourth Proportional to 989.46, 1,482.92 and 527.46

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Solution

The fourth proportional to 989.46, 1,482.92 and 527.46 is: 790.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.46 : 1,482.92 = 527.46 : x
  2. Step 2: Convert to fraction form
    989.46/1,482.92 = 527.46/x
  3. Step 3: Cross multiply
    989.46x = 1,482.92 × 527.46
  4. Step 4: Simplify right side
    989.46x = 782,180.98
  5. Step 5: Solve for x
    x = 782,180.98/989.46
  6. Step 6: Final answer
    x = 790.51

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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.