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Finding the Fourth Proportional to 2,086.67, 3,130.45 and 625.93

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Solution

The fourth proportional to 2,086.67, 3,130.45 and 625.93 is: 939.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,086.67 : 3,130.45 = 625.93 : x
  2. Step 2: Convert to fraction form
    2,086.67/3,130.45 = 625.93/x
  3. Step 3: Cross multiply
    2,086.67x = 3,130.45 × 625.93
  4. Step 4: Simplify right side
    2,086.67x = 1,959,442.57
  5. Step 5: Solve for x
    x = 1,959,442.57/2,086.67
  6. Step 6: Final answer
    x = 939.03

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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.