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Finding the Fourth Proportional to 428,154.56, 642,020.16 and 250,706.24

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Solution

The fourth proportional to 428,154.56, 642,020.16 and 250,706.24 is: 375,935.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,154.56 : 642,020.16 = 250,706.24 : x
  2. Step 2: Convert to fraction form
    428,154.56/642,020.16 = 250,706.24/x
  3. Step 3: Cross multiply
    428,154.56x = 642,020.16 × 250,706.24
  4. Step 4: Simplify right side
    428,154.56x = 160,958,460,317.80
  5. Step 5: Solve for x
    x = 160,958,460,317.80/428,154.56
  6. Step 6: Final answer
    x = 375,935.41

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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.