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Finding the Fourth Proportional to 658,274.40, 908,422 and 356,469.60

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Solution

The fourth proportional to 658,274.40, 908,422 and 356,469.60 is: 491,929.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,274.40 : 908,422 = 356,469.60 : x
  2. Step 2: Convert to fraction form
    658,274.40/908,422 = 356,469.60/x
  3. Step 3: Cross multiply
    658,274.40x = 908,422 × 356,469.60
  4. Step 4: Simplify right side
    658,274.40x = 323,824,826,971.20
  5. Step 5: Solve for x
    x = 323,824,826,971.20/658,274.40
  6. Step 6: Final answer
    x = 491,929.85

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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.