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Finding the Fourth Proportional to 578.89, 798.90 and 316.93

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Solution

The fourth proportional to 578.89, 798.90 and 316.93 is: 437.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.89 : 798.90 = 316.93 : x
  2. Step 2: Convert to fraction form
    578.89/798.90 = 316.93/x
  3. Step 3: Cross multiply
    578.89x = 798.90 × 316.93
  4. Step 4: Simplify right side
    578.89x = 253,189.80
  5. Step 5: Solve for x
    x = 253,189.80/578.89
  6. Step 6: Final answer
    x = 437.37

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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.