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Finding the Fourth Proportional to 538.65, 811.11 and 522.50

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Solution

The fourth proportional to 538.65, 811.11 and 522.50 is: 786.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.65 : 811.11 = 522.50 : x
  2. Step 2: Convert to fraction form
    538.65/811.11 = 522.50/x
  3. Step 3: Cross multiply
    538.65x = 811.11 × 522.50
  4. Step 4: Simplify right side
    538.65x = 423,807.44
  5. Step 5: Solve for x
    x = 423,807.44/538.65
  6. Step 6: Final answer
    x = 786.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.