Home / 2,154.60-2,972.79-1,315.25

Finding the Fourth Proportional to 2,154.60, 2,972.79 and 1,315.25

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Solution

The fourth proportional to 2,154.60, 2,972.79 and 1,315.25 is: 1,814.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.60 : 2,972.79 = 1,315.25 : x
  2. Step 2: Convert to fraction form
    2,154.60/2,972.79 = 1,315.25/x
  3. Step 3: Cross multiply
    2,154.60x = 2,972.79 × 1,315.25
  4. Step 4: Simplify right side
    2,154.60x = 3,909,947.18
  5. Step 5: Solve for x
    x = 3,909,947.18/2,154.60
  6. Step 6: Final answer
    x = 1,814.70

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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.