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Finding the Fourth Proportional to 854.10, 1,177.68 and 629.01

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Solution

The fourth proportional to 854.10, 1,177.68 and 629.01 is: 867.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.10 : 1,177.68 = 629.01 : x
  2. Step 2: Convert to fraction form
    854.10/1,177.68 = 629.01/x
  3. Step 3: Cross multiply
    854.10x = 1,177.68 × 629.01
  4. Step 4: Simplify right side
    854.10x = 740,772.50
  5. Step 5: Solve for x
    x = 740,772.50/854.10
  6. Step 6: Final answer
    x = 867.31

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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.