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Finding the Fourth Proportional to 718.69, 1,076.43 and 624.94

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Solution

The fourth proportional to 718.69, 1,076.43 and 624.94 is: 936.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.69 : 1,076.43 = 624.94 : x
  2. Step 2: Convert to fraction form
    718.69/1,076.43 = 624.94/x
  3. Step 3: Cross multiply
    718.69x = 1,076.43 × 624.94
  4. Step 4: Simplify right side
    718.69x = 672,704.16
  5. Step 5: Solve for x
    x = 672,704.16/718.69
  6. Step 6: Final answer
    x = 936.01

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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.