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Finding the Fourth Proportional to 591.72, 811.38 and 571.12

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Solution

The fourth proportional to 591.72, 811.38 and 571.12 is: 783.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.72 : 811.38 = 571.12 : x
  2. Step 2: Convert to fraction form
    591.72/811.38 = 571.12/x
  3. Step 3: Cross multiply
    591.72x = 811.38 × 571.12
  4. Step 4: Simplify right side
    591.72x = 463,395.35
  5. Step 5: Solve for x
    x = 463,395.35/591.72
  6. Step 6: Final answer
    x = 783.13

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.