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Finding the Fourth Proportional to 1,754.55, 2,630.70 and 828.90

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Solution

The fourth proportional to 1,754.55, 2,630.70 and 828.90 is: 1,242.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,754.55 : 2,630.70 = 828.90 : x
  2. Step 2: Convert to fraction form
    1,754.55/2,630.70 = 828.90/x
  3. Step 3: Cross multiply
    1,754.55x = 2,630.70 × 828.90
  4. Step 4: Simplify right side
    1,754.55x = 2,180,587.23
  5. Step 5: Solve for x
    x = 2,180,587.23/1,754.55
  6. Step 6: Final answer
    x = 1,242.82

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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.