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Finding the Fourth Proportional to 529.15, 793.95 and 221.07

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Solution

The fourth proportional to 529.15, 793.95 and 221.07 is: 331.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.15 : 793.95 = 221.07 : x
  2. Step 2: Convert to fraction form
    529.15/793.95 = 221.07/x
  3. Step 3: Cross multiply
    529.15x = 793.95 × 221.07
  4. Step 4: Simplify right side
    529.15x = 175,518.53
  5. Step 5: Solve for x
    x = 175,518.53/529.15
  6. Step 6: Final answer
    x = 331.70

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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.