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Finding the Fourth Proportional to 457,270.80, 685,420.20 and 220,459.20

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Solution

The fourth proportional to 457,270.80, 685,420.20 and 220,459.20 is: 330,454.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,270.80 : 685,420.20 = 220,459.20 : x
  2. Step 2: Convert to fraction form
    457,270.80/685,420.20 = 220,459.20/x
  3. Step 3: Cross multiply
    457,270.80x = 685,420.20 × 220,459.20
  4. Step 4: Simplify right side
    457,270.80x = 151,107,188,955.84
  5. Step 5: Solve for x
    x = 151,107,188,955.84/457,270.80
  6. Step 6: Final answer
    x = 330,454.49

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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.