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Finding the Fourth Proportional to 1,306.30, 1,962.51 and 845

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Solution

The fourth proportional to 1,306.30, 1,962.51 and 845 is: 1,269.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.30 : 1,962.51 = 845 : x
  2. Step 2: Convert to fraction form
    1,306.30/1,962.51 = 845/x
  3. Step 3: Cross multiply
    1,306.30x = 1,962.51 × 845
  4. Step 4: Simplify right side
    1,306.30x = 1,658,320.95
  5. Step 5: Solve for x
    x = 1,658,320.95/1,306.30
  6. Step 6: Final answer
    x = 1,269.48

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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.