Home / 1,549.80-2,139.48-1,217.16

Finding the Fourth Proportional to 1,549.80, 2,139.48 and 1,217.16

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Solution

The fourth proportional to 1,549.80, 2,139.48 and 1,217.16 is: 1,680.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,549.80 : 2,139.48 = 1,217.16 : x
  2. Step 2: Convert to fraction form
    1,549.80/2,139.48 = 1,217.16/x
  3. Step 3: Cross multiply
    1,549.80x = 2,139.48 × 1,217.16
  4. Step 4: Simplify right side
    1,549.80x = 2,604,089.48
  5. Step 5: Solve for x
    x = 2,604,089.48/1,549.80
  6. Step 6: Final answer
    x = 1,680.27

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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.