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Finding the Fourth Proportional to 1,920.40, 2,878.38 and 1,701.48

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Solution

The fourth proportional to 1,920.40, 2,878.38 and 1,701.48 is: 2,550.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.40 : 2,878.38 = 1,701.48 : x
  2. Step 2: Convert to fraction form
    1,920.40/2,878.38 = 1,701.48/x
  3. Step 3: Cross multiply
    1,920.40x = 2,878.38 × 1,701.48
  4. Step 4: Simplify right side
    1,920.40x = 4,897,506.00
  5. Step 5: Solve for x
    x = 4,897,506.00/1,920.40
  6. Step 6: Final answer
    x = 2,550.25

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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.