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Finding the Fourth Proportional to 715.87, 1,073.43 and 277.28

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Solution

The fourth proportional to 715.87, 1,073.43 and 277.28 is: 415.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.87 : 1,073.43 = 277.28 : x
  2. Step 2: Convert to fraction form
    715.87/1,073.43 = 277.28/x
  3. Step 3: Cross multiply
    715.87x = 1,073.43 × 277.28
  4. Step 4: Simplify right side
    715.87x = 297,639.33
  5. Step 5: Solve for x
    x = 297,639.33/715.87
  6. Step 6: Final answer
    x = 415.77

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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.