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Finding the Fourth Proportional to 457,237.20, 685,855.80 and 279,944.40

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Solution

The fourth proportional to 457,237.20, 685,855.80 and 279,944.40 is: 419,916.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,237.20 : 685,855.80 = 279,944.40 : x
  2. Step 2: Convert to fraction form
    457,237.20/685,855.80 = 279,944.40/x
  3. Step 3: Cross multiply
    457,237.20x = 685,855.80 × 279,944.40
  4. Step 4: Simplify right side
    457,237.20x = 192,001,490,417.52
  5. Step 5: Solve for x
    x = 192,001,490,417.52/457,237.20
  6. Step 6: Final answer
    x = 419,916.60

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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.