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Finding the Fourth Proportional to 568.90, 785.00 and 316.81

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Solution

The fourth proportional to 568.90, 785.00 and 316.81 is: 437.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.90 : 785.00 = 316.81 : x
  2. Step 2: Convert to fraction form
    568.90/785.00 = 316.81/x
  3. Step 3: Cross multiply
    568.90x = 785.00 × 316.81
  4. Step 4: Simplify right side
    568.90x = 248,694.68
  5. Step 5: Solve for x
    x = 248,694.68/568.90
  6. Step 6: Final answer
    x = 437.15

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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.