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Finding the Fourth Proportional to 2,578.79, 3,559.02 and 2,420.45

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Solution

The fourth proportional to 2,578.79, 3,559.02 and 2,420.45 is: 3,340.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.79 : 3,559.02 = 2,420.45 : x
  2. Step 2: Convert to fraction form
    2,578.79/3,559.02 = 2,420.45/x
  3. Step 3: Cross multiply
    2,578.79x = 3,559.02 × 2,420.45
  4. Step 4: Simplify right side
    2,578.79x = 8,614,430.05
  5. Step 5: Solve for x
    x = 8,614,430.05/2,578.79
  6. Step 6: Final answer
    x = 3,340.50

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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.