Home / 2,154.31-2,972.70-1,210.12

Finding the Fourth Proportional to 2,154.31, 2,972.70 and 1,210.12

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Solution

The fourth proportional to 2,154.31, 2,972.70 and 1,210.12 is: 1,669.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.31 : 2,972.70 = 1,210.12 : x
  2. Step 2: Convert to fraction form
    2,154.31/2,972.70 = 1,210.12/x
  3. Step 3: Cross multiply
    2,154.31x = 2,972.70 × 1,210.12
  4. Step 4: Simplify right side
    2,154.31x = 3,597,316.29
  5. Step 5: Solve for x
    x = 3,597,316.29/2,154.31
  6. Step 6: Final answer
    x = 1,669.82

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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.