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Finding the Fourth Proportional to 2,971.62, 4,457.68 and 891.48

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Solution

The fourth proportional to 2,971.62, 4,457.68 and 891.48 is: 1,337.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.62 : 4,457.68 = 891.48 : x
  2. Step 2: Convert to fraction form
    2,971.62/4,457.68 = 891.48/x
  3. Step 3: Cross multiply
    2,971.62x = 4,457.68 × 891.48
  4. Step 4: Simplify right side
    2,971.62x = 3,973,932.57
  5. Step 5: Solve for x
    x = 3,973,932.57/2,971.62
  6. Step 6: Final answer
    x = 1,337.29

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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.