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Finding the Fourth Proportional to 208.33, 312.56 and 100.18

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Solution

The fourth proportional to 208.33, 312.56 and 100.18 is: 150.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.33 : 312.56 = 100.18 : x
  2. Step 2: Convert to fraction form
    208.33/312.56 = 100.18/x
  3. Step 3: Cross multiply
    208.33x = 312.56 × 100.18
  4. Step 4: Simplify right side
    208.33x = 31,312.26
  5. Step 5: Solve for x
    x = 31,312.26/208.33
  6. Step 6: Final answer
    x = 150.30

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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.