Home / 4,977.80-7,430.43-4,428.60

Finding the Fourth Proportional to 4,977.80, 7,430.43 and 4,428.60

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Solution

The fourth proportional to 4,977.80, 7,430.43 and 4,428.60 is: 6,610.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,977.80 : 7,430.43 = 4,428.60 : x
  2. Step 2: Convert to fraction form
    4,977.80/7,430.43 = 4,428.60/x
  3. Step 3: Cross multiply
    4,977.80x = 7,430.43 × 4,428.60
  4. Step 4: Simplify right side
    4,977.80x = 32,906,402.30
  5. Step 5: Solve for x
    x = 32,906,402.30/4,977.80
  6. Step 6: Final answer
    x = 6,610.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.