Home / 1,979.43-2,970.95-1,055.78

Finding the Fourth Proportional to 1,979.43, 2,970.95 and 1,055.78

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Solution

The fourth proportional to 1,979.43, 2,970.95 and 1,055.78 is: 1,584.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.43 : 2,970.95 = 1,055.78 : x
  2. Step 2: Convert to fraction form
    1,979.43/2,970.95 = 1,055.78/x
  3. Step 3: Cross multiply
    1,979.43x = 2,970.95 × 1,055.78
  4. Step 4: Simplify right side
    1,979.43x = 3,136,649.46
  5. Step 5: Solve for x
    x = 3,136,649.46/1,979.43
  6. Step 6: Final answer
    x = 1,584.62

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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.