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Finding the Fourth Proportional to 842.59, 1,263.52 and 355.30

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Solution

The fourth proportional to 842.59, 1,263.52 and 355.30 is: 532.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.59 : 1,263.52 = 355.30 : x
  2. Step 2: Convert to fraction form
    842.59/1,263.52 = 355.30/x
  3. Step 3: Cross multiply
    842.59x = 1,263.52 × 355.30
  4. Step 4: Simplify right side
    842.59x = 448,928.66
  5. Step 5: Solve for x
    x = 448,928.66/842.59
  6. Step 6: Final answer
    x = 532.80

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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.