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Finding the Fourth Proportional to 2,675.86, 4,013.28 and 920.79

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Solution

The fourth proportional to 2,675.86, 4,013.28 and 920.79 is: 1,381.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,675.86 : 4,013.28 = 920.79 : x
  2. Step 2: Convert to fraction form
    2,675.86/4,013.28 = 920.79/x
  3. Step 3: Cross multiply
    2,675.86x = 4,013.28 × 920.79
  4. Step 4: Simplify right side
    2,675.86x = 3,695,388.09
  5. Step 5: Solve for x
    x = 3,695,388.09/2,675.86
  6. Step 6: Final answer
    x = 1,381.01

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1.5x scale

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.