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Finding the Fourth Proportional to 2,595.90, 3,892.68 and 840.60

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Solution

The fourth proportional to 2,595.90, 3,892.68 and 840.60 is: 1,260.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,595.90 : 3,892.68 = 840.60 : x
  2. Step 2: Convert to fraction form
    2,595.90/3,892.68 = 840.60/x
  3. Step 3: Cross multiply
    2,595.90x = 3,892.68 × 840.60
  4. Step 4: Simplify right side
    2,595.90x = 3,272,186.81
  5. Step 5: Solve for x
    x = 3,272,186.81/2,595.90
  6. Step 6: Final answer
    x = 1,260.52

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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.