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Finding the Fourth Proportional to 1,089.16, 1,633.74 and 540.80

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Solution

The fourth proportional to 1,089.16, 1,633.74 and 540.80 is: 811.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.16 : 1,633.74 = 540.80 : x
  2. Step 2: Convert to fraction form
    1,089.16/1,633.74 = 540.80/x
  3. Step 3: Cross multiply
    1,089.16x = 1,633.74 × 540.80
  4. Step 4: Simplify right side
    1,089.16x = 883,526.59
  5. Step 5: Solve for x
    x = 883,526.59/1,089.16
  6. Step 6: Final answer
    x = 811.20

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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.