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Finding the Fourth Proportional to 2,697.36, 3,720.51 and 2,420.34

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Solution

The fourth proportional to 2,697.36, 3,720.51 and 2,420.34 is: 3,338.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,697.36 : 3,720.51 = 2,420.34 : x
  2. Step 2: Convert to fraction form
    2,697.36/3,720.51 = 2,420.34/x
  3. Step 3: Cross multiply
    2,697.36x = 3,720.51 × 2,420.34
  4. Step 4: Simplify right side
    2,697.36x = 9,004,899.17
  5. Step 5: Solve for x
    x = 9,004,899.17/2,697.36
  6. Step 6: Final answer
    x = 3,338.41

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Half scale
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Double scale
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1.5x scale

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.