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Finding the Fourth Proportional to 457,273.20, 685,909.80 and 279,980.40

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Solution

The fourth proportional to 457,273.20, 685,909.80 and 279,980.40 is: 419,970.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,273.20 : 685,909.80 = 279,980.40 : x
  2. Step 2: Convert to fraction form
    457,273.20/685,909.80 = 279,980.40/x
  3. Step 3: Cross multiply
    457,273.20x = 685,909.80 × 279,980.40
  4. Step 4: Simplify right side
    457,273.20x = 192,041,300,167.92
  5. Step 5: Solve for x
    x = 192,041,300,167.92/457,273.20
  6. Step 6: Final answer
    x = 419,970.60

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Similar ratio
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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.