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Finding the Fourth Proportional to 578.65, 798.53 and 316.66

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Solution

The fourth proportional to 578.65, 798.53 and 316.66 is: 436.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.65 : 798.53 = 316.66 : x
  2. Step 2: Convert to fraction form
    578.65/798.53 = 316.66/x
  3. Step 3: Cross multiply
    578.65x = 798.53 × 316.66
  4. Step 4: Simplify right side
    578.65x = 252,860.93
  5. Step 5: Solve for x
    x = 252,860.93/578.65
  6. Step 6: Final answer
    x = 436.99

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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.