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Finding the Fourth Proportional to 775.04, 1,069.54 and 425.73

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Solution

The fourth proportional to 775.04, 1,069.54 and 425.73 is: 587.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.04 : 1,069.54 = 425.73 : x
  2. Step 2: Convert to fraction form
    775.04/1,069.54 = 425.73/x
  3. Step 3: Cross multiply
    775.04x = 1,069.54 × 425.73
  4. Step 4: Simplify right side
    775.04x = 455,334.20
  5. Step 5: Solve for x
    x = 455,334.20/775.04
  6. Step 6: Final answer
    x = 587.50

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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.