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Finding the Fourth Proportional to 482,355.64, 665,879.34 and 321,478.84

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Solution

The fourth proportional to 482,355.64, 665,879.34 and 321,478.84 is: 443,793.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    482,355.64 : 665,879.34 = 321,478.84 : x
  2. Step 2: Convert to fraction form
    482,355.64/665,879.34 = 321,478.84/x
  3. Step 3: Cross multiply
    482,355.64x = 665,879.34 × 321,478.84
  4. Step 4: Simplify right side
    482,355.64x = 214,066,117,803.17
  5. Step 5: Solve for x
    x = 214,066,117,803.17/482,355.64
  6. Step 6: Final answer
    x = 443,793.13

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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.