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Finding the Fourth Proportional to 621.22, 926.44 and 530.50

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Solution

The fourth proportional to 621.22, 926.44 and 530.50 is: 791.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.22 : 926.44 = 530.50 : x
  2. Step 2: Convert to fraction form
    621.22/926.44 = 530.50/x
  3. Step 3: Cross multiply
    621.22x = 926.44 × 530.50
  4. Step 4: Simplify right side
    621.22x = 491,476.42
  5. Step 5: Solve for x
    x = 491,476.42/621.22
  6. Step 6: Final answer
    x = 791.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.