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Finding the Fourth Proportional to 663,794.80, 915,769.20 and 384,208.09

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Solution

The fourth proportional to 663,794.80, 915,769.20 and 384,208.09 is: 530,052.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,794.80 : 915,769.20 = 384,208.09 : x
  2. Step 2: Convert to fraction form
    663,794.80/915,769.20 = 384,208.09/x
  3. Step 3: Cross multiply
    663,794.80x = 915,769.20 × 384,208.09
  4. Step 4: Simplify right side
    663,794.80x = 351,845,935,212.83
  5. Step 5: Solve for x
    x = 351,845,935,212.83/663,794.80
  6. Step 6: Final answer
    x = 530,052.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.