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Finding the Fourth Proportional to 568.02, 783.90 and 319.36

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Solution

The fourth proportional to 568.02, 783.90 and 319.36 is: 440.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.02 : 783.90 = 319.36 : x
  2. Step 2: Convert to fraction form
    568.02/783.90 = 319.36/x
  3. Step 3: Cross multiply
    568.02x = 783.90 × 319.36
  4. Step 4: Simplify right side
    568.02x = 250,346.30
  5. Step 5: Solve for x
    x = 250,346.30/568.02
  6. Step 6: Final answer
    x = 440.74

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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.