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Finding the Fourth Proportional to 1,178.01, 1,624.08 and 911.98

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Solution

The fourth proportional to 1,178.01, 1,624.08 and 911.98 is: 1,257.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.01 : 1,624.08 = 911.98 : x
  2. Step 2: Convert to fraction form
    1,178.01/1,624.08 = 911.98/x
  3. Step 3: Cross multiply
    1,178.01x = 1,624.08 × 911.98
  4. Step 4: Simplify right side
    1,178.01x = 1,481,128.48
  5. Step 5: Solve for x
    x = 1,481,128.48/1,178.01
  6. Step 6: Final answer
    x = 1,257.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.