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Finding the Fourth Proportional to 561.31, 841.79 and 186.00

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Solution

The fourth proportional to 561.31, 841.79 and 186.00 is: 278.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.31 : 841.79 = 186.00 : x
  2. Step 2: Convert to fraction form
    561.31/841.79 = 186.00/x
  3. Step 3: Cross multiply
    561.31x = 841.79 × 186.00
  4. Step 4: Simplify right side
    561.31x = 156,570.25
  5. Step 5: Solve for x
    x = 156,570.25/561.31
  6. Step 6: Final answer
    x = 278.94

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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.