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Finding the Fourth Proportional to 568.04, 783.87 and 319.40

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Solution

The fourth proportional to 568.04, 783.87 and 319.40 is: 440.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.04 : 783.87 = 319.40 : x
  2. Step 2: Convert to fraction form
    568.04/783.87 = 319.40/x
  3. Step 3: Cross multiply
    568.04x = 783.87 × 319.40
  4. Step 4: Simplify right side
    568.04x = 250,368.08
  5. Step 5: Solve for x
    x = 250,368.08/568.04
  6. Step 6: Final answer
    x = 440.76

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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.