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Finding the Fourth Proportional to 383,420.21, 529,130.54 and 220,090.79

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Solution

The fourth proportional to 383,420.21, 529,130.54 and 220,090.79 is: 303,731.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,420.21 : 529,130.54 = 220,090.79 : x
  2. Step 2: Convert to fraction form
    383,420.21/529,130.54 = 220,090.79/x
  3. Step 3: Cross multiply
    383,420.21x = 529,130.54 × 220,090.79
  4. Step 4: Simplify right side
    383,420.21x = 116,456,760,434.78
  5. Step 5: Solve for x
    x = 116,456,760,434.78/383,420.21
  6. Step 6: Final answer
    x = 303,731.41

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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.