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Finding the Fourth Proportional to 493,436.80, 739,982.40 and 256,700.80

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Solution

The fourth proportional to 493,436.80, 739,982.40 and 256,700.80 is: 384,961.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,436.80 : 739,982.40 = 256,700.80 : x
  2. Step 2: Convert to fraction form
    493,436.80/739,982.40 = 256,700.80/x
  3. Step 3: Cross multiply
    493,436.80x = 739,982.40 × 256,700.80
  4. Step 4: Simplify right side
    493,436.80x = 189,954,074,065.92
  5. Step 5: Solve for x
    x = 189,954,074,065.92/493,436.80
  6. Step 6: Final answer
    x = 384,961.30

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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.