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Finding the Fourth Proportional to 636.08, 874.68 and 529.76

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Solution

The fourth proportional to 636.08, 874.68 and 529.76 is: 728.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.08 : 874.68 = 529.76 : x
  2. Step 2: Convert to fraction form
    636.08/874.68 = 529.76/x
  3. Step 3: Cross multiply
    636.08x = 874.68 × 529.76
  4. Step 4: Simplify right side
    636.08x = 463,370.48
  5. Step 5: Solve for x
    x = 463,370.48/636.08
  6. Step 6: Final answer
    x = 728.48

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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.