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Finding the Fourth Proportional to 399,660.57, 551,777.61 and 256,672.68

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Solution

The fourth proportional to 399,660.57, 551,777.61 and 256,672.68 is: 354,366.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,660.57 : 551,777.61 = 256,672.68 : x
  2. Step 2: Convert to fraction form
    399,660.57/551,777.61 = 256,672.68/x
  3. Step 3: Cross multiply
    399,660.57x = 551,777.61 × 256,672.68
  4. Step 4: Simplify right side
    399,660.57x = 141,626,237,922.70
  5. Step 5: Solve for x
    x = 141,626,237,922.70/399,660.57
  6. Step 6: Final answer
    x = 354,366.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.