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Finding the Fourth Proportional to 530.08, 795.21 and 221.78

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Solution

The fourth proportional to 530.08, 795.21 and 221.78 is: 332.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    530.08 : 795.21 = 221.78 : x
  2. Step 2: Convert to fraction form
    530.08/795.21 = 221.78/x
  3. Step 3: Cross multiply
    530.08x = 795.21 × 221.78
  4. Step 4: Simplify right side
    530.08x = 176,356.87
  5. Step 5: Solve for x
    x = 176,356.87/530.08
  6. Step 6: Final answer
    x = 332.70

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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.