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Finding the Fourth Proportional to 425,508.88, 638,357.94 and 185,661.66

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Solution

The fourth proportional to 425,508.88, 638,357.94 and 185,661.66 is: 278,533.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,508.88 : 638,357.94 = 185,661.66 : x
  2. Step 2: Convert to fraction form
    425,508.88/638,357.94 = 185,661.66/x
  3. Step 3: Cross multiply
    425,508.88x = 638,357.94 × 185,661.66
  4. Step 4: Simplify right side
    425,508.88x = 118,518,594,814.58
  5. Step 5: Solve for x
    x = 118,518,594,814.58/425,508.88
  6. Step 6: Final answer
    x = 278,533.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.