Home / 1,681.20-2,321.02-1,122.48

Finding the Fourth Proportional to 1,681.20, 2,321.02 and 1,122.48

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Solution

The fourth proportional to 1,681.20, 2,321.02 and 1,122.48 is: 1,549.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.20 : 2,321.02 = 1,122.48 : x
  2. Step 2: Convert to fraction form
    1,681.20/2,321.02 = 1,122.48/x
  3. Step 3: Cross multiply
    1,681.20x = 2,321.02 × 1,122.48
  4. Step 4: Simplify right side
    1,681.20x = 2,605,304.43
  5. Step 5: Solve for x
    x = 2,605,304.43/1,681.20
  6. Step 6: Final answer
    x = 1,549.67

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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.