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Finding the Fourth Proportional to 1,052.79, 1,578.71 and 505.23

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Solution

The fourth proportional to 1,052.79, 1,578.71 and 505.23 is: 757.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052.79 : 1,578.71 = 505.23 : x
  2. Step 2: Convert to fraction form
    1,052.79/1,578.71 = 505.23/x
  3. Step 3: Cross multiply
    1,052.79x = 1,578.71 × 505.23
  4. Step 4: Simplify right side
    1,052.79x = 797,609.13
  5. Step 5: Solve for x
    x = 797,609.13/1,052.79
  6. Step 6: Final answer
    x = 757.61

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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.