Home / 1,471.84-2,209.20-1,390.24

Finding the Fourth Proportional to 1,471.84, 2,209.20 and 1,390.24

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Solution

The fourth proportional to 1,471.84, 2,209.20 and 1,390.24 is: 2,086.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,471.84 : 2,209.20 = 1,390.24 : x
  2. Step 2: Convert to fraction form
    1,471.84/2,209.20 = 1,390.24/x
  3. Step 3: Cross multiply
    1,471.84x = 2,209.20 × 1,390.24
  4. Step 4: Simplify right side
    1,471.84x = 3,071,318.21
  5. Step 5: Solve for x
    x = 3,071,318.21/1,471.84
  6. Step 6: Final answer
    x = 2,086.72

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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.