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Finding the Fourth Proportional to 368.62, 554.15 and 307.87

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Solution

The fourth proportional to 368.62, 554.15 and 307.87 is: 462.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.62 : 554.15 = 307.87 : x
  2. Step 2: Convert to fraction form
    368.62/554.15 = 307.87/x
  3. Step 3: Cross multiply
    368.62x = 554.15 × 307.87
  4. Step 4: Simplify right side
    368.62x = 170,604.62
  5. Step 5: Solve for x
    x = 170,604.62/368.62
  6. Step 6: Final answer
    x = 462.82

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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.