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Finding the Fourth Proportional to 315.63, 436.13 and 245.87

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Solution

The fourth proportional to 315.63, 436.13 and 245.87 is: 339.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.63 : 436.13 = 245.87 : x
  2. Step 2: Convert to fraction form
    315.63/436.13 = 245.87/x
  3. Step 3: Cross multiply
    315.63x = 436.13 × 245.87
  4. Step 4: Simplify right side
    315.63x = 107,231.81
  5. Step 5: Solve for x
    x = 107,231.81/315.63
  6. Step 6: Final answer
    x = 339.74

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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.