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Finding the Fourth Proportional to 413,612.80, 620,419.20 and 176,979.40

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Solution

The fourth proportional to 413,612.80, 620,419.20 and 176,979.40 is: 265,469.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,612.80 : 620,419.20 = 176,979.40 : x
  2. Step 2: Convert to fraction form
    413,612.80/620,419.20 = 176,979.40/x
  3. Step 3: Cross multiply
    413,612.80x = 620,419.20 × 176,979.40
  4. Step 4: Simplify right side
    413,612.80x = 109,801,417,764.48
  5. Step 5: Solve for x
    x = 109,801,417,764.48/413,612.80
  6. Step 6: Final answer
    x = 265,469.10

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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.