Home / 4,749.75-7,124.63-1,287

Finding the Fourth Proportional to 4,749.75, 7,124.63 and 1,287

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Solution

The fourth proportional to 4,749.75, 7,124.63 and 1,287 is: 1,930.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,749.75 : 7,124.63 = 1,287 : x
  2. Step 2: Convert to fraction form
    4,749.75/7,124.63 = 1,287/x
  3. Step 3: Cross multiply
    4,749.75x = 7,124.63 × 1,287
  4. Step 4: Simplify right side
    4,749.75x = 9,169,392.38
  5. Step 5: Solve for x
    x = 9,169,392.38/4,749.75
  6. Step 6: Final answer
    x = 1,930.50

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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.