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Finding the Fourth Proportional to 641,389.56, 885,211.49 and 369,404.52

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Solution

The fourth proportional to 641,389.56, 885,211.49 and 369,404.52 is: 509,832.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,389.56 : 885,211.49 = 369,404.52 : x
  2. Step 2: Convert to fraction form
    641,389.56/885,211.49 = 369,404.52/x
  3. Step 3: Cross multiply
    641,389.56x = 885,211.49 × 369,404.52
  4. Step 4: Simplify right side
    641,389.56x = 327,001,121,088.00
  5. Step 5: Solve for x
    x = 327,001,121,088.00/641,389.56
  6. Step 6: Final answer
    x = 509,832.31

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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.