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Finding the Fourth Proportional to 370.78, 556.88 and 279.65

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Solution

The fourth proportional to 370.78, 556.88 and 279.65 is: 420.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.78 : 556.88 = 279.65 : x
  2. Step 2: Convert to fraction form
    370.78/556.88 = 279.65/x
  3. Step 3: Cross multiply
    370.78x = 556.88 × 279.65
  4. Step 4: Simplify right side
    370.78x = 155,731.49
  5. Step 5: Solve for x
    x = 155,731.49/370.78
  6. Step 6: Final answer
    x = 420.01

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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.