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Finding the Fourth Proportional to 5,615.20, 7,749 and 3,258.72

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Solution

The fourth proportional to 5,615.20, 7,749 and 3,258.72 is: 4,497.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,615.20 : 7,749 = 3,258.72 : x
  2. Step 2: Convert to fraction form
    5,615.20/7,749 = 3,258.72/x
  3. Step 3: Cross multiply
    5,615.20x = 7,749 × 3,258.72
  4. Step 4: Simplify right side
    5,615.20x = 25,251,821.28
  5. Step 5: Solve for x
    x = 25,251,821.28/5,615.20
  6. Step 6: Final answer
    x = 4,497.05

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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.