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Finding the Fourth Proportional to 512.37, 707.01 and 315.81

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Solution

The fourth proportional to 512.37, 707.01 and 315.81 is: 435.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.37 : 707.01 = 315.81 : x
  2. Step 2: Convert to fraction form
    512.37/707.01 = 315.81/x
  3. Step 3: Cross multiply
    512.37x = 707.01 × 315.81
  4. Step 4: Simplify right side
    512.37x = 223,280.83
  5. Step 5: Solve for x
    x = 223,280.83/512.37
  6. Step 6: Final answer
    x = 435.78

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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.