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Finding the Fourth Proportional to 568.46, 784.45 and 347.78

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Solution

The fourth proportional to 568.46, 784.45 and 347.78 is: 479.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    568.46 : 784.45 = 347.78 : x
  2. Step 2: Convert to fraction form
    568.46/784.45 = 347.78/x
  3. Step 3: Cross multiply
    568.46x = 784.45 × 347.78
  4. Step 4: Simplify right side
    568.46x = 272,816.02
  5. Step 5: Solve for x
    x = 272,816.02/568.46
  6. Step 6: Final answer
    x = 479.92

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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.