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Finding the Fourth Proportional to 987.86, 1,482.44 and 410.73

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Solution

The fourth proportional to 987.86, 1,482.44 and 410.73 is: 616.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.86 : 1,482.44 = 410.73 : x
  2. Step 2: Convert to fraction form
    987.86/1,482.44 = 410.73/x
  3. Step 3: Cross multiply
    987.86x = 1,482.44 × 410.73
  4. Step 4: Simplify right side
    987.86x = 608,880.53
  5. Step 5: Solve for x
    x = 608,880.53/987.86
  6. Step 6: Final answer
    x = 616.37

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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.