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Finding the Fourth Proportional to 558,565.38, 768,401.39 and 489,343.11

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Solution

The fourth proportional to 558,565.38, 768,401.39 and 489,343.11 is: 673,174.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,565.38 : 768,401.39 = 489,343.11 : x
  2. Step 2: Convert to fraction form
    558,565.38/768,401.39 = 489,343.11/x
  3. Step 3: Cross multiply
    558,565.38x = 768,401.39 × 489,343.11
  4. Step 4: Simplify right side
    558,565.38x = 376,011,924,741.91
  5. Step 5: Solve for x
    x = 376,011,924,741.91/558,565.38
  6. Step 6: Final answer
    x = 673,174.42

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Double scale
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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.