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Finding the Fourth Proportional to 450,045.08, 620,769.60 and 288,644.48

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Solution

The fourth proportional to 450,045.08, 620,769.60 and 288,644.48 is: 398,141.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,045.08 : 620,769.60 = 288,644.48 : x
  2. Step 2: Convert to fraction form
    450,045.08/620,769.60 = 288,644.48/x
  3. Step 3: Cross multiply
    450,045.08x = 620,769.60 × 288,644.48
  4. Step 4: Simplify right side
    450,045.08x = 179,181,718,391.81
  5. Step 5: Solve for x
    x = 179,181,718,391.81/450,045.08
  6. Step 6: Final answer
    x = 398,141.71

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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.