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Finding the Fourth Proportional to 842.69, 1,263.23 and 432.02

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Solution

The fourth proportional to 842.69, 1,263.23 and 432.02 is: 647.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.69 : 1,263.23 = 432.02 : x
  2. Step 2: Convert to fraction form
    842.69/1,263.23 = 432.02/x
  3. Step 3: Cross multiply
    842.69x = 1,263.23 × 432.02
  4. Step 4: Simplify right side
    842.69x = 545,738.46
  5. Step 5: Solve for x
    x = 545,738.46/842.69
  6. Step 6: Final answer
    x = 647.61

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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.