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Finding the Fourth Proportional to 485,289.18, 669,342.60 and 321,649.74

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Solution

The fourth proportional to 485,289.18, 669,342.60 and 321,649.74 is: 443,640.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,289.18 : 669,342.60 = 321,649.74 : x
  2. Step 2: Convert to fraction form
    485,289.18/669,342.60 = 321,649.74/x
  3. Step 3: Cross multiply
    485,289.18x = 669,342.60 × 321,649.74
  4. Step 4: Simplify right side
    485,289.18x = 215,293,873,260.92
  5. Step 5: Solve for x
    x = 215,293,873,260.92/485,289.18
  6. Step 6: Final answer
    x = 443,640.37

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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.