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Finding the Fourth Proportional to 428,392.40, 591,205.05 and 237,401.69

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Solution

The fourth proportional to 428,392.40, 591,205.05 and 237,401.69 is: 327,627.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,392.40 : 591,205.05 = 237,401.69 : x
  2. Step 2: Convert to fraction form
    428,392.40/591,205.05 = 237,401.69/x
  3. Step 3: Cross multiply
    428,392.40x = 591,205.05 × 237,401.69
  4. Step 4: Simplify right side
    428,392.40x = 140,353,076,819.53
  5. Step 5: Solve for x
    x = 140,353,076,819.53/428,392.40
  6. Step 6: Final answer
    x = 327,627.37

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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.