Home / 1,970.91-2,957.40-1,277.39

Finding the Fourth Proportional to 1,970.91, 2,957.40 and 1,277.39

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Solution

The fourth proportional to 1,970.91, 2,957.40 and 1,277.39 is: 1,916.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.91 : 2,957.40 = 1,277.39 : x
  2. Step 2: Convert to fraction form
    1,970.91/2,957.40 = 1,277.39/x
  3. Step 3: Cross multiply
    1,970.91x = 2,957.40 × 1,277.39
  4. Step 4: Simplify right side
    1,970.91x = 3,777,760.58
  5. Step 5: Solve for x
    x = 3,777,760.58/1,970.91
  6. Step 6: Final answer
    x = 1,916.76

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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.