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Finding the Fourth Proportional to 2,856.60, 4,284.72 and 910.20

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Solution

The fourth proportional to 2,856.60, 4,284.72 and 910.20 is: 1,365.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.60 : 4,284.72 = 910.20 : x
  2. Step 2: Convert to fraction form
    2,856.60/4,284.72 = 910.20/x
  3. Step 3: Cross multiply
    2,856.60x = 4,284.72 × 910.20
  4. Step 4: Simplify right side
    2,856.60x = 3,899,952.14
  5. Step 5: Solve for x
    x = 3,899,952.14/2,856.60
  6. Step 6: Final answer
    x = 1,365.24

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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.