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Finding the Fourth Proportional to 436.30, 601.91 and 278.90

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Solution

The fourth proportional to 436.30, 601.91 and 278.90 is: 384.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.30 : 601.91 = 278.90 : x
  2. Step 2: Convert to fraction form
    436.30/601.91 = 278.90/x
  3. Step 3: Cross multiply
    436.30x = 601.91 × 278.90
  4. Step 4: Simplify right side
    436.30x = 167,868.29
  5. Step 5: Solve for x
    x = 167,868.29/436.30
  6. Step 6: Final answer
    x = 384.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.