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Finding the Fourth Proportional to 568.64, 784.78 and 320.02

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Solution

The fourth proportional to 568.64, 784.78 and 320.02 is: 441.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.64 : 784.78 = 320.02 : x
  2. Step 2: Convert to fraction form
    568.64/784.78 = 320.02/x
  3. Step 3: Cross multiply
    568.64x = 784.78 × 320.02
  4. Step 4: Simplify right side
    568.64x = 251,145.30
  5. Step 5: Solve for x
    x = 251,145.30/568.64
  6. Step 6: Final answer
    x = 441.66

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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.