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Finding the Fourth Proportional to 530.12, 794.90 and 221.91

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Solution

The fourth proportional to 530.12, 794.90 and 221.91 is: 332.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.12 : 794.90 = 221.91 : x
  2. Step 2: Convert to fraction form
    530.12/794.90 = 221.91/x
  3. Step 3: Cross multiply
    530.12x = 794.90 × 221.91
  4. Step 4: Simplify right side
    530.12x = 176,395.15
  5. Step 5: Solve for x
    x = 176,395.15/530.12
  6. Step 6: Final answer
    x = 332.75

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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.