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Finding the Fourth Proportional to 2,836.30, 4,251.54 and 985.89

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Solution

The fourth proportional to 2,836.30, 4,251.54 and 985.89 is: 1,477.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,836.30 : 4,251.54 = 985.89 : x
  2. Step 2: Convert to fraction form
    2,836.30/4,251.54 = 985.89/x
  3. Step 3: Cross multiply
    2,836.30x = 4,251.54 × 985.89
  4. Step 4: Simplify right side
    2,836.30x = 4,191,570.41
  5. Step 5: Solve for x
    x = 4,191,570.41/2,836.30
  6. Step 6: Final answer
    x = 1,477.83

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1.5x scale

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.