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Finding the Fourth Proportional to 624.02, 940.26 and 518.18

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Solution

The fourth proportional to 624.02, 940.26 and 518.18 is: 780.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.02 : 940.26 = 518.18 : x
  2. Step 2: Convert to fraction form
    624.02/940.26 = 518.18/x
  3. Step 3: Cross multiply
    624.02x = 940.26 × 518.18
  4. Step 4: Simplify right side
    624.02x = 487,223.93
  5. Step 5: Solve for x
    x = 487,223.93/624.02
  6. Step 6: Final answer
    x = 780.78

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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.