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Finding the Fourth Proportional to 642,476.90, 886,604.90 and 355,994.48

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Solution

The fourth proportional to 642,476.90, 886,604.90 and 355,994.48 is: 491,265.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,476.90 : 886,604.90 = 355,994.48 : x
  2. Step 2: Convert to fraction form
    642,476.90/886,604.90 = 355,994.48/x
  3. Step 3: Cross multiply
    642,476.90x = 886,604.90 × 355,994.48
  4. Step 4: Simplify right side
    642,476.90x = 315,626,450,777.49
  5. Step 5: Solve for x
    x = 315,626,450,777.49/642,476.90
  6. Step 6: Final answer
    x = 491,265.05

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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.