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Finding the Fourth Proportional to 492,635.79, 679,844.96 and 288,637.89

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Solution

The fourth proportional to 492,635.79, 679,844.96 and 288,637.89 is: 398,324.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,635.79 : 679,844.96 = 288,637.89 : x
  2. Step 2: Convert to fraction form
    492,635.79/679,844.96 = 288,637.89/x
  3. Step 3: Cross multiply
    492,635.79x = 679,844.96 × 288,637.89
  4. Step 4: Simplify right side
    492,635.79x = 196,229,013,338.35
  5. Step 5: Solve for x
    x = 196,229,013,338.35/492,635.79
  6. Step 6: Final answer
    x = 398,324.72

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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.