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Finding the Fourth Proportional to 515,392, 773,612.16 and 355,479.04

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Solution

The fourth proportional to 515,392, 773,612.16 and 355,479.04 is: 533,580.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,392 : 773,612.16 = 355,479.04 : x
  2. Step 2: Convert to fraction form
    515,392/773,612.16 = 355,479.04/x
  3. Step 3: Cross multiply
    515,392x = 773,612.16 × 355,479.04
  4. Step 4: Simplify right side
    515,392x = 275,002,907,969.13
  5. Step 5: Solve for x
    x = 275,002,907,969.13/515,392
  6. Step 6: Final answer
    x = 533,580.09

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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.