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Finding the Fourth Proportional to 4,928.48, 7,393.20 and 1,640.80

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Solution

The fourth proportional to 4,928.48, 7,393.20 and 1,640.80 is: 2,461.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,928.48 : 7,393.20 = 1,640.80 : x
  2. Step 2: Convert to fraction form
    4,928.48/7,393.20 = 1,640.80/x
  3. Step 3: Cross multiply
    4,928.48x = 7,393.20 × 1,640.80
  4. Step 4: Simplify right side
    4,928.48x = 12,130,762.56
  5. Step 5: Solve for x
    x = 12,130,762.56/4,928.48
  6. Step 6: Final answer
    x = 2,461.36

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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.