Home / 2,920.96-4,378.40-1,277.20

Finding the Fourth Proportional to 2,920.96, 4,378.40 and 1,277.20

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Solution

The fourth proportional to 2,920.96, 4,378.40 and 1,277.20 is: 1,914.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,920.96 : 4,378.40 = 1,277.20 : x
  2. Step 2: Convert to fraction form
    2,920.96/4,378.40 = 1,277.20/x
  3. Step 3: Cross multiply
    2,920.96x = 4,378.40 × 1,277.20
  4. Step 4: Simplify right side
    2,920.96x = 5,592,064.20
  5. Step 5: Solve for x
    x = 5,592,064.20/2,920.96
  6. Step 6: Final answer
    x = 1,914.46

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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.