Home / 1,210.04-1,817.22-991.09

Finding the Fourth Proportional to 1,210.04, 1,817.22 and 991.09

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Solution

The fourth proportional to 1,210.04, 1,817.22 and 991.09 is: 1,488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.04 : 1,817.22 = 991.09 : x
  2. Step 2: Convert to fraction form
    1,210.04/1,817.22 = 991.09/x
  3. Step 3: Cross multiply
    1,210.04x = 1,817.22 × 991.09
  4. Step 4: Simplify right side
    1,210.04x = 1,801,028.57
  5. Step 5: Solve for x
    x = 1,801,028.57/1,210.04
  6. Step 6: Final answer
    x = 1,488.40

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1.5x scale

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.