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Finding the Fourth Proportional to 711.57, 1,068.72 and 495.57

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Solution

The fourth proportional to 711.57, 1,068.72 and 495.57 is: 744.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.57 : 1,068.72 = 495.57 : x
  2. Step 2: Convert to fraction form
    711.57/1,068.72 = 495.57/x
  3. Step 3: Cross multiply
    711.57x = 1,068.72 × 495.57
  4. Step 4: Simplify right side
    711.57x = 529,625.57
  5. Step 5: Solve for x
    x = 529,625.57/711.57
  6. Step 6: Final answer
    x = 744.31

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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.