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Finding the Fourth Proportional to 1,025.38, 1,415.04 and 559.63

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Solution

The fourth proportional to 1,025.38, 1,415.04 and 559.63 is: 772.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.38 : 1,415.04 = 559.63 : x
  2. Step 2: Convert to fraction form
    1,025.38/1,415.04 = 559.63/x
  3. Step 3: Cross multiply
    1,025.38x = 1,415.04 × 559.63
  4. Step 4: Simplify right side
    1,025.38x = 791,891.76
  5. Step 5: Solve for x
    x = 791,891.76/1,025.38
  6. Step 6: Final answer
    x = 772.29

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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.