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Finding the Fourth Proportional to 490,777.61, 680,005.82 and 480,148.79

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Solution

The fourth proportional to 490,777.61, 680,005.82 and 480,148.79 is: 665,278.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,777.61 : 680,005.82 = 480,148.79 : x
  2. Step 2: Convert to fraction form
    490,777.61/680,005.82 = 480,148.79/x
  3. Step 3: Cross multiply
    490,777.61x = 680,005.82 × 480,148.79
  4. Step 4: Simplify right side
    490,777.61x = 326,503,969,466.30
  5. Step 5: Solve for x
    x = 326,503,969,466.30/490,777.61
  6. Step 6: Final answer
    x = 665,278.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.