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Finding the Fourth Proportional to 561.37, 841.53 and 378.82

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Solution

The fourth proportional to 561.37, 841.53 and 378.82 is: 567.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.37 : 841.53 = 378.82 : x
  2. Step 2: Convert to fraction form
    561.37/841.53 = 378.82/x
  3. Step 3: Cross multiply
    561.37x = 841.53 × 378.82
  4. Step 4: Simplify right side
    561.37x = 318,784.19
  5. Step 5: Solve for x
    x = 318,784.19/561.37
  6. Step 6: Final answer
    x = 567.87

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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.