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Finding the Fourth Proportional to 343,290, 515,012.88 and 121,674

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Solution

The fourth proportional to 343,290, 515,012.88 and 121,674 is: 182,538.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,290 : 515,012.88 = 121,674 : x
  2. Step 2: Convert to fraction form
    343,290/515,012.88 = 121,674/x
  3. Step 3: Cross multiply
    343,290x = 515,012.88 × 121,674
  4. Step 4: Simplify right side
    343,290x = 62,663,677,161.12
  5. Step 5: Solve for x
    x = 62,663,677,161.12/343,290
  6. Step 6: Final answer
    x = 182,538.60

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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.