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Finding the Fourth Proportional to 2,681.20, 4,021.80 and 832.30

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Solution

The fourth proportional to 2,681.20, 4,021.80 and 832.30 is: 1,248.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,681.20 : 4,021.80 = 832.30 : x
  2. Step 2: Convert to fraction form
    2,681.20/4,021.80 = 832.30/x
  3. Step 3: Cross multiply
    2,681.20x = 4,021.80 × 832.30
  4. Step 4: Simplify right side
    2,681.20x = 3,347,344.14
  5. Step 5: Solve for x
    x = 3,347,344.14/2,681.20
  6. Step 6: Final answer
    x = 1,248.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.