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Finding the Fourth Proportional to 1,881.60, 2,820.68 and 726.48

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Solution

The fourth proportional to 1,881.60, 2,820.68 and 726.48 is: 1,089.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,881.60 : 2,820.68 = 726.48 : x
  2. Step 2: Convert to fraction form
    1,881.60/2,820.68 = 726.48/x
  3. Step 3: Cross multiply
    1,881.60x = 2,820.68 × 726.48
  4. Step 4: Simplify right side
    1,881.60x = 2,049,167.61
  5. Step 5: Solve for x
    x = 2,049,167.61/1,881.60
  6. Step 6: Final answer
    x = 1,089.06

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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.