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Finding the Fourth Proportional to 870.96, 1,306.58 and 254.60

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Solution

The fourth proportional to 870.96, 1,306.58 and 254.60 is: 381.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.96 : 1,306.58 = 254.60 : x
  2. Step 2: Convert to fraction form
    870.96/1,306.58 = 254.60/x
  3. Step 3: Cross multiply
    870.96x = 1,306.58 × 254.60
  4. Step 4: Simplify right side
    870.96x = 332,647.46
  5. Step 5: Solve for x
    x = 332,647.46/870.96
  6. Step 6: Final answer
    x = 381.93

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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.