Home / 2,929.68-4,042.80-1,687.68

Finding the Fourth Proportional to 2,929.68, 4,042.80 and 1,687.68

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Solution

The fourth proportional to 2,929.68, 4,042.80 and 1,687.68 is: 2,328.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,929.68 : 4,042.80 = 1,687.68 : x
  2. Step 2: Convert to fraction form
    2,929.68/4,042.80 = 1,687.68/x
  3. Step 3: Cross multiply
    2,929.68x = 4,042.80 × 1,687.68
  4. Step 4: Simplify right side
    2,929.68x = 6,822,952.70
  5. Step 5: Solve for x
    x = 6,822,952.70/2,929.68
  6. Step 6: Final answer
    x = 2,328.91

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1.5x scale

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.