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Finding the Fourth Proportional to 485,447.67, 670,229.10 and 313,442.55

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Solution

The fourth proportional to 485,447.67, 670,229.10 and 313,442.55 is: 432,751.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,447.67 : 670,229.10 = 313,442.55 : x
  2. Step 2: Convert to fraction form
    485,447.67/670,229.10 = 313,442.55/x
  3. Step 3: Cross multiply
    485,447.67x = 670,229.10 × 313,442.55
  4. Step 4: Simplify right side
    485,447.67x = 210,078,318,188.21
  5. Step 5: Solve for x
    x = 210,078,318,188.21/485,447.67
  6. Step 6: Final answer
    x = 432,751.73

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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.