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Finding the Fourth Proportional to 393,480.48, 542,355.60 and 278,797.60

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Solution

The fourth proportional to 393,480.48, 542,355.60 and 278,797.60 is: 384,281.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,480.48 : 542,355.60 = 278,797.60 : x
  2. Step 2: Convert to fraction form
    393,480.48/542,355.60 = 278,797.60/x
  3. Step 3: Cross multiply
    393,480.48x = 542,355.60 × 278,797.60
  4. Step 4: Simplify right side
    393,480.48x = 151,207,439,626.56
  5. Step 5: Solve for x
    x = 151,207,439,626.56/393,480.48
  6. Step 6: Final answer
    x = 384,281.93

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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.