Home / 1,214.30-1,671.63-1,089.92

Finding the Fourth Proportional to 1,214.30, 1,671.63 and 1,089.92

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Solution

The fourth proportional to 1,214.30, 1,671.63 and 1,089.92 is: 1,500.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.30 : 1,671.63 = 1,089.92 : x
  2. Step 2: Convert to fraction form
    1,214.30/1,671.63 = 1,089.92/x
  3. Step 3: Cross multiply
    1,214.30x = 1,671.63 × 1,089.92
  4. Step 4: Simplify right side
    1,214.30x = 1,821,942.97
  5. Step 5: Solve for x
    x = 1,821,942.97/1,214.30
  6. Step 6: Final answer
    x = 1,500.41

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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.