Home / 1,929.20-2,662.02-1,089.80

Finding the Fourth Proportional to 1,929.20, 2,662.02 and 1,089.80

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Solution

The fourth proportional to 1,929.20, 2,662.02 and 1,089.80 is: 1,503.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.20 : 2,662.02 = 1,089.80 : x
  2. Step 2: Convert to fraction form
    1,929.20/2,662.02 = 1,089.80/x
  3. Step 3: Cross multiply
    1,929.20x = 2,662.02 × 1,089.80
  4. Step 4: Simplify right side
    1,929.20x = 2,901,069.40
  5. Step 5: Solve for x
    x = 2,901,069.40/1,929.20
  6. Step 6: Final answer
    x = 1,503.77

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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.