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Finding the Fourth Proportional to 492,416.52, 679,587.04 and 288,638.66

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Solution

The fourth proportional to 492,416.52, 679,587.04 and 288,638.66 is: 398,351.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,416.52 : 679,587.04 = 288,638.66 : x
  2. Step 2: Convert to fraction form
    492,416.52/679,587.04 = 288,638.66/x
  3. Step 3: Cross multiply
    492,416.52x = 679,587.04 × 288,638.66
  4. Step 4: Simplify right side
    492,416.52x = 196,155,092,578.97
  5. Step 5: Solve for x
    x = 196,155,092,578.97/492,416.52
  6. Step 6: Final answer
    x = 398,351.97

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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.