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Finding the Fourth Proportional to 2,911.79, 4,367.62 and 720.51

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Solution

The fourth proportional to 2,911.79, 4,367.62 and 720.51 is: 1,080.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.79 : 4,367.62 = 720.51 : x
  2. Step 2: Convert to fraction form
    2,911.79/4,367.62 = 720.51/x
  3. Step 3: Cross multiply
    2,911.79x = 4,367.62 × 720.51
  4. Step 4: Simplify right side
    2,911.79x = 3,146,926.61
  5. Step 5: Solve for x
    x = 3,146,926.61/2,911.79
  6. Step 6: Final answer
    x = 1,080.76

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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.