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Finding the Fourth Proportional to 1,363.14, 1,878.93 and 920.88

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Solution

The fourth proportional to 1,363.14, 1,878.93 and 920.88 is: 1,269.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.14 : 1,878.93 = 920.88 : x
  2. Step 2: Convert to fraction form
    1,363.14/1,878.93 = 920.88/x
  3. Step 3: Cross multiply
    1,363.14x = 1,878.93 × 920.88
  4. Step 4: Simplify right side
    1,363.14x = 1,730,269.06
  5. Step 5: Solve for x
    x = 1,730,269.06/1,363.14
  6. Step 6: Final answer
    x = 1,269.33

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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.