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Finding the Fourth Proportional to 1,233.54, 1,847.88 and 821.52

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Solution

The fourth proportional to 1,233.54, 1,847.88 and 821.52 is: 1,230.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.54 : 1,847.88 = 821.52 : x
  2. Step 2: Convert to fraction form
    1,233.54/1,847.88 = 821.52/x
  3. Step 3: Cross multiply
    1,233.54x = 1,847.88 × 821.52
  4. Step 4: Simplify right side
    1,233.54x = 1,518,070.38
  5. Step 5: Solve for x
    x = 1,518,070.38/1,233.54
  6. Step 6: Final answer
    x = 1,230.66

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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.