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Finding the Fourth Proportional to 642,287.38, 885,857.61 and 438,502.54

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Solution

The fourth proportional to 642,287.38, 885,857.61 and 438,502.54 is: 604,792.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,287.38 : 885,857.61 = 438,502.54 : x
  2. Step 2: Convert to fraction form
    642,287.38/885,857.61 = 438,502.54/x
  3. Step 3: Cross multiply
    642,287.38x = 885,857.61 × 438,502.54
  4. Step 4: Simplify right side
    642,287.38x = 388,450,812,063.33
  5. Step 5: Solve for x
    x = 388,450,812,063.33/642,287.38
  6. Step 6: Final answer
    x = 604,792.85

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1.5x scale

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.