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Finding the Fourth Proportional to 624.72, 937.02 and 419.40

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Solution

The fourth proportional to 624.72, 937.02 and 419.40 is: 629.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.72 : 937.02 = 419.40 : x
  2. Step 2: Convert to fraction form
    624.72/937.02 = 419.40/x
  3. Step 3: Cross multiply
    624.72x = 937.02 × 419.40
  4. Step 4: Simplify right side
    624.72x = 392,986.19
  5. Step 5: Solve for x
    x = 392,986.19/624.72
  6. Step 6: Final answer
    x = 629.06

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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.