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Finding the Fourth Proportional to 399,790.76, 551,658.06 and 256,744.62

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Solution

The fourth proportional to 399,790.76, 551,658.06 and 256,744.62 is: 354,273.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,790.76 : 551,658.06 = 256,744.62 : x
  2. Step 2: Convert to fraction form
    399,790.76/551,658.06 = 256,744.62/x
  3. Step 3: Cross multiply
    399,790.76x = 551,658.06 × 256,744.62
  4. Step 4: Simplify right side
    399,790.76x = 141,635,238,984.64
  5. Step 5: Solve for x
    x = 141,635,238,984.64/399,790.76
  6. Step 6: Final answer
    x = 354,273.42

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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.