Home / 2,478.88-3,420.84-1,430.94

Finding the Fourth Proportional to 2,478.88, 3,420.84 and 1,430.94

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Solution

The fourth proportional to 2,478.88, 3,420.84 and 1,430.94 is: 1,974.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.88 : 3,420.84 = 1,430.94 : x
  2. Step 2: Convert to fraction form
    2,478.88/3,420.84 = 1,430.94/x
  3. Step 3: Cross multiply
    2,478.88x = 3,420.84 × 1,430.94
  4. Step 4: Simplify right side
    2,478.88x = 4,895,016.79
  5. Step 5: Solve for x
    x = 4,895,016.79/2,478.88
  6. Step 6: Final answer
    x = 1,974.69

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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.