Home / 1,972.30-2,957.36-1,240.31

Finding the Fourth Proportional to 1,972.30, 2,957.36 and 1,240.31

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Solution

The fourth proportional to 1,972.30, 2,957.36 and 1,240.31 is: 1,859.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.30 : 2,957.36 = 1,240.31 : x
  2. Step 2: Convert to fraction form
    1,972.30/2,957.36 = 1,240.31/x
  3. Step 3: Cross multiply
    1,972.30x = 2,957.36 × 1,240.31
  4. Step 4: Simplify right side
    1,972.30x = 3,668,051.35
  5. Step 5: Solve for x
    x = 3,668,051.35/1,972.30
  6. Step 6: Final answer
    x = 1,859.78

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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.