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Finding the Fourth Proportional to 530.12, 795.19 and 221.90

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Solution

The fourth proportional to 530.12, 795.19 and 221.90 is: 332.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.12 : 795.19 = 221.90 : x
  2. Step 2: Convert to fraction form
    530.12/795.19 = 221.90/x
  3. Step 3: Cross multiply
    530.12x = 795.19 × 221.90
  4. Step 4: Simplify right side
    530.12x = 176,452.66
  5. Step 5: Solve for x
    x = 176,452.66/530.12
  6. Step 6: Final answer
    x = 332.85

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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.