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Finding the Fourth Proportional to 343,257.26, 514,920.48 and 90,555.21

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Solution

The fourth proportional to 343,257.26, 514,920.48 and 90,555.21 is: 135,841.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,257.26 : 514,920.48 = 90,555.21 : x
  2. Step 2: Convert to fraction form
    343,257.26/514,920.48 = 90,555.21/x
  3. Step 3: Cross multiply
    343,257.26x = 514,920.48 × 90,555.21
  4. Step 4: Simplify right side
    343,257.26x = 46,628,732,199.70
  5. Step 5: Solve for x
    x = 46,628,732,199.70/343,257.26
  6. Step 6: Final answer
    x = 135,841.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.