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Finding the Fourth Proportional to 545,743.20, 818,760.60 and 486,985.80

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Solution

The fourth proportional to 545,743.20, 818,760.60 and 486,985.80 is: 730,608.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,743.20 : 818,760.60 = 486,985.80 : x
  2. Step 2: Convert to fraction form
    545,743.20/818,760.60 = 486,985.80/x
  3. Step 3: Cross multiply
    545,743.20x = 818,760.60 × 486,985.80
  4. Step 4: Simplify right side
    545,743.20x = 398,724,785,799.48
  5. Step 5: Solve for x
    x = 398,724,785,799.48/545,743.20
  6. Step 6: Final answer
    x = 730,608.80

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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.