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Finding the Fourth Proportional to 538.57, 807.80 and 245.99

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Solution

The fourth proportional to 538.57, 807.80 and 245.99 is: 368.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.57 : 807.80 = 245.99 : x
  2. Step 2: Convert to fraction form
    538.57/807.80 = 245.99/x
  3. Step 3: Cross multiply
    538.57x = 807.80 × 245.99
  4. Step 4: Simplify right side
    538.57x = 198,710.72
  5. Step 5: Solve for x
    x = 198,710.72/538.57
  6. Step 6: Final answer
    x = 368.96

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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.