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Finding the Fourth Proportional to 379,207.48, 523,261.56 and 209,431.48

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Solution

The fourth proportional to 379,207.48, 523,261.56 and 209,431.48 is: 288,990.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,207.48 : 523,261.56 = 209,431.48 : x
  2. Step 2: Convert to fraction form
    379,207.48/523,261.56 = 209,431.48/x
  3. Step 3: Cross multiply
    379,207.48x = 523,261.56 × 209,431.48
  4. Step 4: Simplify right side
    379,207.48x = 109,587,442,937.91
  5. Step 5: Solve for x
    x = 109,587,442,937.91/379,207.48
  6. Step 6: Final answer
    x = 288,990.72

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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.