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Finding the Fourth Proportional to 399,239.10, 595,803.19 and 356,640.78

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Solution

The fourth proportional to 399,239.10, 595,803.19 and 356,640.78 is: 532,231.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,239.10 : 595,803.19 = 356,640.78 : x
  2. Step 2: Convert to fraction form
    399,239.10/595,803.19 = 356,640.78/x
  3. Step 3: Cross multiply
    399,239.10x = 595,803.19 × 356,640.78
  4. Step 4: Simplify right side
    399,239.10x = 212,487,714,408.09
  5. Step 5: Solve for x
    x = 212,487,714,408.09/399,239.10
  6. Step 6: Final answer
    x = 532,231.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.