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Finding the Fourth Proportional to 2,656.10, 3,984.15 and 807.05

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Solution

The fourth proportional to 2,656.10, 3,984.15 and 807.05 is: 1,210.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,656.10 : 3,984.15 = 807.05 : x
  2. Step 2: Convert to fraction form
    2,656.10/3,984.15 = 807.05/x
  3. Step 3: Cross multiply
    2,656.10x = 3,984.15 × 807.05
  4. Step 4: Simplify right side
    2,656.10x = 3,215,408.26
  5. Step 5: Solve for x
    x = 3,215,408.26/2,656.10
  6. Step 6: Final answer
    x = 1,210.58

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Double scale
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Similar ratio
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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.