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Finding the Fourth Proportional to 6,479.60, 8,935.98 and 4,240.76

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Solution

The fourth proportional to 6,479.60, 8,935.98 and 4,240.76 is: 5,848.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,479.60 : 8,935.98 = 4,240.76 : x
  2. Step 2: Convert to fraction form
    6,479.60/8,935.98 = 4,240.76/x
  3. Step 3: Cross multiply
    6,479.60x = 8,935.98 × 4,240.76
  4. Step 4: Simplify right side
    6,479.60x = 37,895,346.54
  5. Step 5: Solve for x
    x = 37,895,346.54/6,479.60
  6. Step 6: Final answer
    x = 5,848.41

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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.