Home / 2,153.88-2,972.68-1,315.07

Finding the Fourth Proportional to 2,153.88, 2,972.68 and 1,315.07

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Solution

The fourth proportional to 2,153.88, 2,972.68 and 1,315.07 is: 1,815.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.88 : 2,972.68 = 1,315.07 : x
  2. Step 2: Convert to fraction form
    2,153.88/2,972.68 = 1,315.07/x
  3. Step 3: Cross multiply
    2,153.88x = 2,972.68 × 1,315.07
  4. Step 4: Simplify right side
    2,153.88x = 3,909,282.29
  5. Step 5: Solve for x
    x = 3,909,282.29/2,153.88
  6. Step 6: Final answer
    x = 1,815.00

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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.