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Finding the Fourth Proportional to 2,301.40, 3,451.76 and 840.21

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Solution

The fourth proportional to 2,301.40, 3,451.76 and 840.21 is: 1,260.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,301.40 : 3,451.76 = 840.21 : x
  2. Step 2: Convert to fraction form
    2,301.40/3,451.76 = 840.21/x
  3. Step 3: Cross multiply
    2,301.40x = 3,451.76 × 840.21
  4. Step 4: Simplify right side
    2,301.40x = 2,900,203.27
  5. Step 5: Solve for x
    x = 2,900,203.27/2,301.40
  6. Step 6: Final answer
    x = 1,260.19

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1.5x scale

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.