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Finding the Fourth Proportional to 630,816, 870,297.84 and 485,665.92

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Solution

The fourth proportional to 630,816, 870,297.84 and 485,665.92 is: 670,043.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,816 : 870,297.84 = 485,665.92 : x
  2. Step 2: Convert to fraction form
    630,816/870,297.84 = 485,665.92/x
  3. Step 3: Cross multiply
    630,816x = 870,297.84 × 485,665.92
  4. Step 4: Simplify right side
    630,816x = 422,674,001,137.61
  5. Step 5: Solve for x
    x = 422,674,001,137.61/630,816
  6. Step 6: Final answer
    x = 670,043.25

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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.