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Finding the Fourth Proportional to 623.02, 938.75 and 517.18

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Solution

The fourth proportional to 623.02, 938.75 and 517.18 is: 779.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.02 : 938.75 = 517.18 : x
  2. Step 2: Convert to fraction form
    623.02/938.75 = 517.18/x
  3. Step 3: Cross multiply
    623.02x = 938.75 × 517.18
  4. Step 4: Simplify right side
    623.02x = 485,502.73
  5. Step 5: Solve for x
    x = 485,502.73/623.02
  6. Step 6: Final answer
    x = 779.27

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.