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Finding the Fourth Proportional to 1,043.50, 1,565.25 and 274

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Solution

The fourth proportional to 1,043.50, 1,565.25 and 274 is: 411

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,043.50 : 1,565.25 = 274 : x
  2. Step 2: Convert to fraction form
    1,043.50/1,565.25 = 274/x
  3. Step 3: Cross multiply
    1,043.50x = 1,565.25 × 274
  4. Step 4: Simplify right side
    1,043.50x = 428,878.50
  5. Step 5: Solve for x
    x = 428,878.50/1,043.50
  6. Step 6: Final answer
    x = 411

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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.