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Finding the Fourth Proportional to 343,489.63, 515,256.50 and 90,763.66

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Solution

The fourth proportional to 343,489.63, 515,256.50 and 90,763.66 is: 136,151.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,489.63 : 515,256.50 = 90,763.66 : x
  2. Step 2: Convert to fraction form
    343,489.63/515,256.50 = 90,763.66/x
  3. Step 3: Cross multiply
    343,489.63x = 515,256.50 × 90,763.66
  4. Step 4: Simplify right side
    343,489.63x = 46,766,565,669.92
  5. Step 5: Solve for x
    x = 46,766,565,669.92/343,489.63
  6. Step 6: Final answer
    x = 136,151.32

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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.