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Finding the Fourth Proportional to 642,833.78, 887,118.64 and 370,958.10

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Solution

The fourth proportional to 642,833.78, 887,118.64 and 370,958.10 is: 511,926.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,833.78 : 887,118.64 = 370,958.10 : x
  2. Step 2: Convert to fraction form
    642,833.78/887,118.64 = 370,958.10/x
  3. Step 3: Cross multiply
    642,833.78x = 887,118.64 × 370,958.10
  4. Step 4: Simplify right side
    642,833.78x = 329,083,845,168.98
  5. Step 5: Solve for x
    x = 329,083,845,168.98/642,833.78
  6. Step 6: Final answer
    x = 511,926.81

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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.