Home / 1,571.20-2,358.48-1,389.76

Finding the Fourth Proportional to 1,571.20, 2,358.48 and 1,389.76

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Solution

The fourth proportional to 1,571.20, 2,358.48 and 1,389.76 is: 2,086.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.20 : 2,358.48 = 1,389.76 : x
  2. Step 2: Convert to fraction form
    1,571.20/2,358.48 = 1,389.76/x
  3. Step 3: Cross multiply
    1,571.20x = 2,358.48 × 1,389.76
  4. Step 4: Simplify right side
    1,571.20x = 3,277,721.16
  5. Step 5: Solve for x
    x = 3,277,721.16/1,571.20
  6. Step 6: Final answer
    x = 2,086.13

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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.