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Finding the Fourth Proportional to 1,029.89, 1,539.34 and 897.09

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Solution

The fourth proportional to 1,029.89, 1,539.34 and 897.09 is: 1,340.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.89 : 1,539.34 = 897.09 : x
  2. Step 2: Convert to fraction form
    1,029.89/1,539.34 = 897.09/x
  3. Step 3: Cross multiply
    1,029.89x = 1,539.34 × 897.09
  4. Step 4: Simplify right side
    1,029.89x = 1,380,926.52
  5. Step 5: Solve for x
    x = 1,380,926.52/1,029.89
  6. Step 6: Final answer
    x = 1,340.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.