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Finding the Fourth Proportional to 338.56, 510.41 and 315.07

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Solution

The fourth proportional to 338.56, 510.41 and 315.07 is: 475.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.56 : 510.41 = 315.07 : x
  2. Step 2: Convert to fraction form
    338.56/510.41 = 315.07/x
  3. Step 3: Cross multiply
    338.56x = 510.41 × 315.07
  4. Step 4: Simplify right side
    338.56x = 160,814.39
  5. Step 5: Solve for x
    x = 160,814.39/338.56
  6. Step 6: Final answer
    x = 475.00

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.