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Finding the Fourth Proportional to 642,456.72, 886,566.36 and 370,536

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Solution

The fourth proportional to 642,456.72, 886,566.36 and 370,536 is: 511,325.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,456.72 : 886,566.36 = 370,536 : x
  2. Step 2: Convert to fraction form
    642,456.72/886,566.36 = 370,536/x
  3. Step 3: Cross multiply
    642,456.72x = 886,566.36 × 370,536
  4. Step 4: Simplify right side
    642,456.72x = 328,504,752,768.96
  5. Step 5: Solve for x
    x = 328,504,752,768.96/642,456.72
  6. Step 6: Final answer
    x = 511,325.89

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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.