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Finding the Fourth Proportional to 3,278.64, 4,917.96 and 970.14

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Solution

The fourth proportional to 3,278.64, 4,917.96 and 970.14 is: 1,455.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,278.64 : 4,917.96 = 970.14 : x
  2. Step 2: Convert to fraction form
    3,278.64/4,917.96 = 970.14/x
  3. Step 3: Cross multiply
    3,278.64x = 4,917.96 × 970.14
  4. Step 4: Simplify right side
    3,278.64x = 4,771,109.71
  5. Step 5: Solve for x
    x = 4,771,109.71/3,278.64
  6. Step 6: Final answer
    x = 1,455.21

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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.