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Finding the Fourth Proportional to 727.57, 1,089.60 and 453.32

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Solution

The fourth proportional to 727.57, 1,089.60 and 453.32 is: 678.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.57 : 1,089.60 = 453.32 : x
  2. Step 2: Convert to fraction form
    727.57/1,089.60 = 453.32/x
  3. Step 3: Cross multiply
    727.57x = 1,089.60 × 453.32
  4. Step 4: Simplify right side
    727.57x = 493,937.47
  5. Step 5: Solve for x
    x = 493,937.47/727.57
  6. Step 6: Final answer
    x = 678.89

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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.