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Finding the Fourth Proportional to 675,078, 931,636.80 and 373,272

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Solution

The fourth proportional to 675,078, 931,636.80 and 373,272 is: 515,131.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,078 : 931,636.80 = 373,272 : x
  2. Step 2: Convert to fraction form
    675,078/931,636.80 = 373,272/x
  3. Step 3: Cross multiply
    675,078x = 931,636.80 × 373,272
  4. Step 4: Simplify right side
    675,078x = 347,753,931,609.60
  5. Step 5: Solve for x
    x = 347,753,931,609.60/675,078
  6. Step 6: Final answer
    x = 515,131.48

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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.