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Finding the Fourth Proportional to 1,624.40, 2,241.67 and 878.35

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Solution

The fourth proportional to 1,624.40, 2,241.67 and 878.35 is: 1,212.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,624.40 : 2,241.67 = 878.35 : x
  2. Step 2: Convert to fraction form
    1,624.40/2,241.67 = 878.35/x
  3. Step 3: Cross multiply
    1,624.40x = 2,241.67 × 878.35
  4. Step 4: Simplify right side
    1,624.40x = 1,968,975.57
  5. Step 5: Solve for x
    x = 1,968,975.57/1,624.40
  6. Step 6: Final answer
    x = 1,212.13

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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.