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Finding the Fourth Proportional to 4,428.70, 6,643.05 and 4,137.10

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Solution

The fourth proportional to 4,428.70, 6,643.05 and 4,137.10 is: 6,205.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,428.70 : 6,643.05 = 4,137.10 : x
  2. Step 2: Convert to fraction form
    4,428.70/6,643.05 = 4,137.10/x
  3. Step 3: Cross multiply
    4,428.70x = 6,643.05 × 4,137.10
  4. Step 4: Simplify right side
    4,428.70x = 27,482,962.16
  5. Step 5: Solve for x
    x = 27,482,962.16/4,428.70
  6. Step 6: Final answer
    x = 6,205.65

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Half scale
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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.