Home / 5,278.76-7,284.58-2,920.76

Finding the Fourth Proportional to 5,278.76, 7,284.58 and 2,920.76

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Solution

The fourth proportional to 5,278.76, 7,284.58 and 2,920.76 is: 4,030.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.76 : 7,284.58 = 2,920.76 : x
  2. Step 2: Convert to fraction form
    5,278.76/7,284.58 = 2,920.76/x
  3. Step 3: Cross multiply
    5,278.76x = 7,284.58 × 2,920.76
  4. Step 4: Simplify right side
    5,278.76x = 21,276,509.88
  5. Step 5: Solve for x
    x = 21,276,509.88/5,278.76
  6. Step 6: Final answer
    x = 4,030.59

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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.