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Finding the Fourth Proportional to 1,520.76, 2,282.34 and 790.54

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Solution

The fourth proportional to 1,520.76, 2,282.34 and 790.54 is: 1,186.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.76 : 2,282.34 = 790.54 : x
  2. Step 2: Convert to fraction form
    1,520.76/2,282.34 = 790.54/x
  3. Step 3: Cross multiply
    1,520.76x = 2,282.34 × 790.54
  4. Step 4: Simplify right side
    1,520.76x = 1,804,281.06
  5. Step 5: Solve for x
    x = 1,804,281.06/1,520.76
  6. Step 6: Final answer
    x = 1,186.43

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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.