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Finding the Fourth Proportional to 1,053.43, 1,578.96 and 394.67

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Solution

The fourth proportional to 1,053.43, 1,578.96 and 394.67 is: 591.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,053.43 : 1,578.96 = 394.67 : x
  2. Step 2: Convert to fraction form
    1,053.43/1,578.96 = 394.67/x
  3. Step 3: Cross multiply
    1,053.43x = 1,578.96 × 394.67
  4. Step 4: Simplify right side
    1,053.43x = 623,169.13
  5. Step 5: Solve for x
    x = 623,169.13/1,053.43
  6. Step 6: Final answer
    x = 591.56

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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.