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Finding the Fourth Proportional to 370.20, 554.88 and 187.74

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Solution

The fourth proportional to 370.20, 554.88 and 187.74 is: 281.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.20 : 554.88 = 187.74 : x
  2. Step 2: Convert to fraction form
    370.20/554.88 = 187.74/x
  3. Step 3: Cross multiply
    370.20x = 554.88 × 187.74
  4. Step 4: Simplify right side
    370.20x = 104,173.17
  5. Step 5: Solve for x
    x = 104,173.17/370.20
  6. Step 6: Final answer
    x = 281.40

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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.