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Finding the Fourth Proportional to 374.58, 561.15 and 343.98

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Solution

The fourth proportional to 374.58, 561.15 and 343.98 is: 515.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.58 : 561.15 = 343.98 : x
  2. Step 2: Convert to fraction form
    374.58/561.15 = 343.98/x
  3. Step 3: Cross multiply
    374.58x = 561.15 × 343.98
  4. Step 4: Simplify right side
    374.58x = 193,024.38
  5. Step 5: Solve for x
    x = 193,024.38/374.58
  6. Step 6: Final answer
    x = 515.31

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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.