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Finding the Fourth Proportional to 4,938.40, 7,407.60 and 4,400.80

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Solution

The fourth proportional to 4,938.40, 7,407.60 and 4,400.80 is: 6,601.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,938.40 : 7,407.60 = 4,400.80 : x
  2. Step 2: Convert to fraction form
    4,938.40/7,407.60 = 4,400.80/x
  3. Step 3: Cross multiply
    4,938.40x = 7,407.60 × 4,400.80
  4. Step 4: Simplify right side
    4,938.40x = 32,599,366.08
  5. Step 5: Solve for x
    x = 32,599,366.08/4,938.40
  6. Step 6: Final answer
    x = 6,601.20

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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.