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Finding the Fourth Proportional to 439,612.68, 658,393.56 and 320,989.80

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Solution

The fourth proportional to 439,612.68, 658,393.56 and 320,989.80 is: 480,735.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,612.68 : 658,393.56 = 320,989.80 : x
  2. Step 2: Convert to fraction form
    439,612.68/658,393.56 = 320,989.80/x
  3. Step 3: Cross multiply
    439,612.68x = 658,393.56 × 320,989.80
  4. Step 4: Simplify right side
    439,612.68x = 211,337,617,145.69
  5. Step 5: Solve for x
    x = 211,337,617,145.69/439,612.68
  6. Step 6: Final answer
    x = 480,735.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.