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Finding the Fourth Proportional to 436.88, 657.91 and 315.99

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Solution

The fourth proportional to 436.88, 657.91 and 315.99 is: 475.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.88 : 657.91 = 315.99 : x
  2. Step 2: Convert to fraction form
    436.88/657.91 = 315.99/x
  3. Step 3: Cross multiply
    436.88x = 657.91 × 315.99
  4. Step 4: Simplify right side
    436.88x = 207,893.38
  5. Step 5: Solve for x
    x = 207,893.38/436.88
  6. Step 6: Final answer
    x = 475.86

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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.