Home / 1,432.08-2,145.32-987.27

Finding the Fourth Proportional to 1,432.08, 2,145.32 and 987.27

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Solution

The fourth proportional to 1,432.08, 2,145.32 and 987.27 is: 1,478.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.08 : 2,145.32 = 987.27 : x
  2. Step 2: Convert to fraction form
    1,432.08/2,145.32 = 987.27/x
  3. Step 3: Cross multiply
    1,432.08x = 2,145.32 × 987.27
  4. Step 4: Simplify right side
    1,432.08x = 2,118,000.80
  5. Step 5: Solve for x
    x = 2,118,000.80/1,432.08
  6. Step 6: Final answer
    x = 1,478.97

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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.