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Finding the Fourth Proportional to 374.64, 561.20 and 277.43

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Solution

The fourth proportional to 374.64, 561.20 and 277.43 is: 415.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.64 : 561.20 = 277.43 : x
  2. Step 2: Convert to fraction form
    374.64/561.20 = 277.43/x
  3. Step 3: Cross multiply
    374.64x = 561.20 × 277.43
  4. Step 4: Simplify right side
    374.64x = 155,693.72
  5. Step 5: Solve for x
    x = 155,693.72/374.64
  6. Step 6: Final answer
    x = 415.58

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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.