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Finding the Fourth Proportional to 315.37, 436.31 and 293.50

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Solution

The fourth proportional to 315.37, 436.31 and 293.50 is: 406.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.37 : 436.31 = 293.50 : x
  2. Step 2: Convert to fraction form
    315.37/436.31 = 293.50/x
  3. Step 3: Cross multiply
    315.37x = 436.31 × 293.50
  4. Step 4: Simplify right side
    315.37x = 128,056.99
  5. Step 5: Solve for x
    x = 128,056.99/315.37
  6. Step 6: Final answer
    x = 406.05

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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.