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Finding the Fourth Proportional to 1,760.84, 2,639.52 and 981.20

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Solution

The fourth proportional to 1,760.84, 2,639.52 and 981.20 is: 1,470.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,760.84 : 2,639.52 = 981.20 : x
  2. Step 2: Convert to fraction form
    1,760.84/2,639.52 = 981.20/x
  3. Step 3: Cross multiply
    1,760.84x = 2,639.52 × 981.20
  4. Step 4: Simplify right side
    1,760.84x = 2,589,897.02
  5. Step 5: Solve for x
    x = 2,589,897.02/1,760.84
  6. Step 6: Final answer
    x = 1,470.83

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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.