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Finding the Fourth Proportional to 1,498.20, 2,068.20 and 909

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Solution

The fourth proportional to 1,498.20, 2,068.20 and 909 is: 1,254.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,498.20 : 2,068.20 = 909 : x
  2. Step 2: Convert to fraction form
    1,498.20/2,068.20 = 909/x
  3. Step 3: Cross multiply
    1,498.20x = 2,068.20 × 909
  4. Step 4: Simplify right side
    1,498.20x = 1,879,993.80
  5. Step 5: Solve for x
    x = 1,879,993.80/1,498.20
  6. Step 6: Final answer
    x = 1,254.84

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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.