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Finding the Fourth Proportional to 425,879.45, 638,579.65 and 141,417.77

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Solution

The fourth proportional to 425,879.45, 638,579.65 and 141,417.77 is: 212,047.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,879.45 : 638,579.65 = 141,417.77 : x
  2. Step 2: Convert to fraction form
    425,879.45/638,579.65 = 141,417.77/x
  3. Step 3: Cross multiply
    425,879.45x = 638,579.65 × 141,417.77
  4. Step 4: Simplify right side
    425,879.45x = 90,306,511,313.29
  5. Step 5: Solve for x
    x = 90,306,511,313.29/425,879.45
  6. Step 6: Final answer
    x = 212,047.12

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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.