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Finding the Fourth Proportional to 399,183.66, 549,937.71 and 278,105.94

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Solution

The fourth proportional to 399,183.66, 549,937.71 and 278,105.94 is: 383,134.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,183.66 : 549,937.71 = 278,105.94 : x
  2. Step 2: Convert to fraction form
    399,183.66/549,937.71 = 278,105.94/x
  3. Step 3: Cross multiply
    399,183.66x = 549,937.71 × 278,105.94
  4. Step 4: Simplify right side
    399,183.66x = 152,940,943,781.00
  5. Step 5: Solve for x
    x = 152,940,943,781.00/399,183.66
  6. Step 6: Final answer
    x = 383,134.28

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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.