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Finding the Fourth Proportional to 399,785.07, 551,650.06 and 256,738.87

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Solution

The fourth proportional to 399,785.07, 551,650.06 and 256,738.87 is: 354,265.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,785.07 : 551,650.06 = 256,738.87 : x
  2. Step 2: Convert to fraction form
    399,785.07/551,650.06 = 256,738.87/x
  3. Step 3: Cross multiply
    399,785.07x = 551,650.06 × 256,738.87
  4. Step 4: Simplify right side
    399,785.07x = 141,630,013,039.83
  5. Step 5: Solve for x
    x = 141,630,013,039.83/399,785.07
  6. Step 6: Final answer
    x = 354,265.39

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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.