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Finding the Fourth Proportional to 641,851.26, 885,754.36 and 355,389.50

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Solution

The fourth proportional to 641,851.26, 885,754.36 and 355,389.50 is: 490,437.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,851.26 : 885,754.36 = 355,389.50 : x
  2. Step 2: Convert to fraction form
    641,851.26/885,754.36 = 355,389.50/x
  3. Step 3: Cross multiply
    641,851.26x = 885,754.36 × 355,389.50
  4. Step 4: Simplify right side
    641,851.26x = 314,787,799,123.22
  5. Step 5: Solve for x
    x = 314,787,799,123.22/641,851.26
  6. Step 6: Final answer
    x = 490,437.30

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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.