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Finding the Fourth Proportional to 522.96, 721.80 and 316.24

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Solution

The fourth proportional to 522.96, 721.80 and 316.24 is: 436.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.96 : 721.80 = 316.24 : x
  2. Step 2: Convert to fraction form
    522.96/721.80 = 316.24/x
  3. Step 3: Cross multiply
    522.96x = 721.80 × 316.24
  4. Step 4: Simplify right side
    522.96x = 228,262.03
  5. Step 5: Solve for x
    x = 228,262.03/522.96
  6. Step 6: Final answer
    x = 436.48

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1.5x scale

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.