Home / 1,979.15-2,970.95-1,249.13

Finding the Fourth Proportional to 1,979.15, 2,970.95 and 1,249.13

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Solution

The fourth proportional to 1,979.15, 2,970.95 and 1,249.13 is: 1,875.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.15 : 2,970.95 = 1,249.13 : x
  2. Step 2: Convert to fraction form
    1,979.15/2,970.95 = 1,249.13/x
  3. Step 3: Cross multiply
    1,979.15x = 2,970.95 × 1,249.13
  4. Step 4: Simplify right side
    1,979.15x = 3,711,081.67
  5. Step 5: Solve for x
    x = 3,711,081.67/1,979.15
  6. Step 6: Final answer
    x = 1,875.09

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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.