Home / 1,571.13-2,167.52-981.35

Finding the Fourth Proportional to 1,571.13, 2,167.52 and 981.35

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Solution

The fourth proportional to 1,571.13, 2,167.52 and 981.35 is: 1,353.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.13 : 2,167.52 = 981.35 : x
  2. Step 2: Convert to fraction form
    1,571.13/2,167.52 = 981.35/x
  3. Step 3: Cross multiply
    1,571.13x = 2,167.52 × 981.35
  4. Step 4: Simplify right side
    1,571.13x = 2,127,080.01
  5. Step 5: Solve for x
    x = 2,127,080.01/1,571.13
  6. Step 6: Final answer
    x = 1,353.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.