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Finding the Fourth Proportional to 1,577.50, 2,177.09 and 879.01

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Solution

The fourth proportional to 1,577.50, 2,177.09 and 879.01 is: 1,213.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,577.50 : 2,177.09 = 879.01 : x
  2. Step 2: Convert to fraction form
    1,577.50/2,177.09 = 879.01/x
  3. Step 3: Cross multiply
    1,577.50x = 2,177.09 × 879.01
  4. Step 4: Simplify right side
    1,577.50x = 1,913,683.88
  5. Step 5: Solve for x
    x = 1,913,683.88/1,577.50
  6. Step 6: Final answer
    x = 1,213.11

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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.