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Finding the Fourth Proportional to 1,953.97, 2,930.07 and 720.51

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Solution

The fourth proportional to 1,953.97, 2,930.07 and 720.51 is: 1,080.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.97 : 2,930.07 = 720.51 : x
  2. Step 2: Convert to fraction form
    1,953.97/2,930.07 = 720.51/x
  3. Step 3: Cross multiply
    1,953.97x = 2,930.07 × 720.51
  4. Step 4: Simplify right side
    1,953.97x = 2,111,152.93
  5. Step 5: Solve for x
    x = 2,111,152.93/1,953.97
  6. Step 6: Final answer
    x = 1,080.44

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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.