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Finding the Fourth Proportional to 492,006.80, 679,063.56 and 288,102.80

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Solution

The fourth proportional to 492,006.80, 679,063.56 and 288,102.80 is: 397,637.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,006.80 : 679,063.56 = 288,102.80 : x
  2. Step 2: Convert to fraction form
    492,006.80/679,063.56 = 288,102.80/x
  3. Step 3: Cross multiply
    492,006.80x = 679,063.56 × 288,102.80
  4. Step 4: Simplify right side
    492,006.80x = 195,640,113,013.97
  5. Step 5: Solve for x
    x = 195,640,113,013.97/492,006.80
  6. Step 6: Final answer
    x = 397,637.01

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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.