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Finding the Fourth Proportional to 641,608.80, 885,641.64 and 369,785.16

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Solution

The fourth proportional to 641,608.80, 885,641.64 and 369,785.16 is: 510,431.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,608.80 : 885,641.64 = 369,785.16 : x
  2. Step 2: Convert to fraction form
    641,608.80/885,641.64 = 369,785.16/x
  3. Step 3: Cross multiply
    641,608.80x = 885,641.64 × 369,785.16
  4. Step 4: Simplify right side
    641,608.80x = 327,497,135,550.06
  5. Step 5: Solve for x
    x = 327,497,135,550.06/641,608.80
  6. Step 6: Final answer
    x = 510,431.18

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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.