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Finding the Fourth Proportional to 428,096.80, 642,242.40 and 250,512.40

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Solution

The fourth proportional to 428,096.80, 642,242.40 and 250,512.40 is: 375,825.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,096.80 : 642,242.40 = 250,512.40 : x
  2. Step 2: Convert to fraction form
    428,096.80/642,242.40 = 250,512.40/x
  3. Step 3: Cross multiply
    428,096.80x = 642,242.40 × 250,512.40
  4. Step 4: Simplify right side
    428,096.80x = 160,889,685,005.76
  5. Step 5: Solve for x
    x = 160,889,685,005.76/428,096.80
  6. Step 6: Final answer
    x = 375,825.48

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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.