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Finding the Fourth Proportional to 987.72, 1,482.30 and 797.64

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Solution

The fourth proportional to 987.72, 1,482.30 and 797.64 is: 1,197.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.72 : 1,482.30 = 797.64 : x
  2. Step 2: Convert to fraction form
    987.72/1,482.30 = 797.64/x
  3. Step 3: Cross multiply
    987.72x = 1,482.30 × 797.64
  4. Step 4: Simplify right side
    987.72x = 1,182,341.77
  5. Step 5: Solve for x
    x = 1,182,341.77/987.72
  6. Step 6: Final answer
    x = 1,197.04

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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.