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Finding the Fourth Proportional to 1,957.79, 2,700.19 and 1,721.24

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Solution

The fourth proportional to 1,957.79, 2,700.19 and 1,721.24 is: 2,373.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,957.79 : 2,700.19 = 1,721.24 : x
  2. Step 2: Convert to fraction form
    1,957.79/2,700.19 = 1,721.24/x
  3. Step 3: Cross multiply
    1,957.79x = 2,700.19 × 1,721.24
  4. Step 4: Simplify right side
    1,957.79x = 4,647,666.43
  5. Step 5: Solve for x
    x = 4,647,666.43/1,957.79
  6. Step 6: Final answer
    x = 2,373.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.