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Finding the Fourth Proportional to 399,037.32, 550,621.89 and 253,859.76

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Solution

The fourth proportional to 399,037.32, 550,621.89 and 253,859.76 is: 350,294.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,037.32 : 550,621.89 = 253,859.76 : x
  2. Step 2: Convert to fraction form
    399,037.32/550,621.89 = 253,859.76/x
  3. Step 3: Cross multiply
    399,037.32x = 550,621.89 × 253,859.76
  4. Step 4: Simplify right side
    399,037.32x = 139,780,740,846.15
  5. Step 5: Solve for x
    x = 139,780,740,846.15/399,037.32
  6. Step 6: Final answer
    x = 350,294.91

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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.