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Finding the Fourth Proportional to 436.87, 602.84 and 312.82

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Solution

The fourth proportional to 436.87, 602.84 and 312.82 is: 431.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.87 : 602.84 = 312.82 : x
  2. Step 2: Convert to fraction form
    436.87/602.84 = 312.82/x
  3. Step 3: Cross multiply
    436.87x = 602.84 × 312.82
  4. Step 4: Simplify right side
    436.87x = 188,580.41
  5. Step 5: Solve for x
    x = 188,580.41/436.87
  6. Step 6: Final answer
    x = 431.66

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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.