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Finding the Fourth Proportional to 315.99, 436.14 and 242.19

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Solution

The fourth proportional to 315.99, 436.14 and 242.19 is: 334.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.99 : 436.14 = 242.19 : x
  2. Step 2: Convert to fraction form
    315.99/436.14 = 242.19/x
  3. Step 3: Cross multiply
    315.99x = 436.14 × 242.19
  4. Step 4: Simplify right side
    315.99x = 105,628.75
  5. Step 5: Solve for x
    x = 105,628.75/315.99
  6. Step 6: Final answer
    x = 334.28

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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.