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Finding the Fourth Proportional to 486,794.18, 671,812.29 and 280,125.86

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Solution

The fourth proportional to 486,794.18, 671,812.29 and 280,125.86 is: 386,594.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,794.18 : 671,812.29 = 280,125.86 : x
  2. Step 2: Convert to fraction form
    486,794.18/671,812.29 = 280,125.86/x
  3. Step 3: Cross multiply
    486,794.18x = 671,812.29 × 280,125.86
  4. Step 4: Simplify right side
    486,794.18x = 188,191,995,494.82
  5. Step 5: Solve for x
    x = 188,191,995,494.82/486,794.18
  6. Step 6: Final answer
    x = 386,594.59

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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.