Home / 1,403.20-1,937.64-880.12

Finding the Fourth Proportional to 1,403.20, 1,937.64 and 880.12

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Solution

The fourth proportional to 1,403.20, 1,937.64 and 880.12 is: 1,215.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.20 : 1,937.64 = 880.12 : x
  2. Step 2: Convert to fraction form
    1,403.20/1,937.64 = 880.12/x
  3. Step 3: Cross multiply
    1,403.20x = 1,937.64 × 880.12
  4. Step 4: Simplify right side
    1,403.20x = 1,705,355.72
  5. Step 5: Solve for x
    x = 1,705,355.72/1,403.20
  6. Step 6: Final answer
    x = 1,215.33

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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.