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Finding the Fourth Proportional to 658,615.95, 908,907.75 and 372,129.48

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Solution

The fourth proportional to 658,615.95, 908,907.75 and 372,129.48 is: 513,548.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,615.95 : 908,907.75 = 372,129.48 : x
  2. Step 2: Convert to fraction form
    658,615.95/908,907.75 = 372,129.48/x
  3. Step 3: Cross multiply
    658,615.95x = 908,907.75 × 372,129.48
  4. Step 4: Simplify right side
    658,615.95x = 338,231,368,375.47
  5. Step 5: Solve for x
    x = 338,231,368,375.47/658,615.95
  6. Step 6: Final answer
    x = 513,548.71

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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.