Home / 2,153.90-2,972.57-1,209.76

Finding the Fourth Proportional to 2,153.90, 2,972.57 and 1,209.76

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Solution

The fourth proportional to 2,153.90, 2,972.57 and 1,209.76 is: 1,669.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.90 : 2,972.57 = 1,209.76 : x
  2. Step 2: Convert to fraction form
    2,153.90/2,972.57 = 1,209.76/x
  3. Step 3: Cross multiply
    2,153.90x = 2,972.57 × 1,209.76
  4. Step 4: Simplify right side
    2,153.90x = 3,596,082.80
  5. Step 5: Solve for x
    x = 3,596,082.80/2,153.90
  6. Step 6: Final answer
    x = 1,669.57

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1.5x scale

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.