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Finding the Fourth Proportional to 642,427.14, 886,512.42 and 355,930.14

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Solution

The fourth proportional to 642,427.14, 886,512.42 and 355,930.14 is: 491,163.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,427.14 : 886,512.42 = 355,930.14 : x
  2. Step 2: Convert to fraction form
    642,427.14/886,512.42 = 355,930.14/x
  3. Step 3: Cross multiply
    642,427.14x = 886,512.42 × 355,930.14
  4. Step 4: Simplify right side
    642,427.14x = 315,536,489,762.34
  5. Step 5: Solve for x
    x = 315,536,489,762.34/642,427.14
  6. Step 6: Final answer
    x = 491,163.08

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1.5x scale

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.