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Finding the Fourth Proportional to 436.80, 602.35 and 279.15

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Solution

The fourth proportional to 436.80, 602.35 and 279.15 is: 384.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.80 : 602.35 = 279.15 : x
  2. Step 2: Convert to fraction form
    436.80/602.35 = 279.15/x
  3. Step 3: Cross multiply
    436.80x = 602.35 × 279.15
  4. Step 4: Simplify right side
    436.80x = 168,146.00
  5. Step 5: Solve for x
    x = 168,146.00/436.80
  6. Step 6: Final answer
    x = 384.95

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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.