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Finding the Fourth Proportional to 538.70, 808.05 and 356.05

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Solution

The fourth proportional to 538.70, 808.05 and 356.05 is: 534.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.70 : 808.05 = 356.05 : x
  2. Step 2: Convert to fraction form
    538.70/808.05 = 356.05/x
  3. Step 3: Cross multiply
    538.70x = 808.05 × 356.05
  4. Step 4: Simplify right side
    538.70x = 287,706.20
  5. Step 5: Solve for x
    x = 287,706.20/538.70
  6. Step 6: Final answer
    x = 534.08

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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.