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Finding the Fourth Proportional to 415,449.63, 623,279.30 and 115,929.95

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Solution

The fourth proportional to 415,449.63, 623,279.30 and 115,929.95 is: 173,924.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,449.63 : 623,279.30 = 115,929.95 : x
  2. Step 2: Convert to fraction form
    415,449.63/623,279.30 = 115,929.95/x
  3. Step 3: Cross multiply
    415,449.63x = 623,279.30 × 115,929.95
  4. Step 4: Simplify right side
    415,449.63x = 72,256,734,388.99
  5. Step 5: Solve for x
    x = 72,256,734,388.99/415,449.63
  6. Step 6: Final answer
    x = 173,924.18

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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.