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Finding the Fourth Proportional to 1,178.07, 1,767.14 and 561.84

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Solution

The fourth proportional to 1,178.07, 1,767.14 and 561.84 is: 842.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.07 : 1,767.14 = 561.84 : x
  2. Step 2: Convert to fraction form
    1,178.07/1,767.14 = 561.84/x
  3. Step 3: Cross multiply
    1,178.07x = 1,767.14 × 561.84
  4. Step 4: Simplify right side
    1,178.07x = 992,849.94
  5. Step 5: Solve for x
    x = 992,849.94/1,178.07
  6. Step 6: Final answer
    x = 842.78

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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.