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Finding the Fourth Proportional to 491.42, 737.15 and 347.78

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Solution

The fourth proportional to 491.42, 737.15 and 347.78 is: 521.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.42 : 737.15 = 347.78 : x
  2. Step 2: Convert to fraction form
    491.42/737.15 = 347.78/x
  3. Step 3: Cross multiply
    491.42x = 737.15 × 347.78
  4. Step 4: Simplify right side
    491.42x = 256,360.60
  5. Step 5: Solve for x
    x = 256,360.60/491.42
  6. Step 6: Final answer
    x = 521.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.