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Finding the Fourth Proportional to 1,609.13, 2,220.59 and 873.13

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Solution

The fourth proportional to 1,609.13, 2,220.59 and 873.13 is: 1,204.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,609.13 : 2,220.59 = 873.13 : x
  2. Step 2: Convert to fraction form
    1,609.13/2,220.59 = 873.13/x
  3. Step 3: Cross multiply
    1,609.13x = 2,220.59 × 873.13
  4. Step 4: Simplify right side
    1,609.13x = 1,938,863.75
  5. Step 5: Solve for x
    x = 1,938,863.75/1,609.13
  6. Step 6: Final answer
    x = 1,204.91

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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.