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Finding the Fourth Proportional to 285,304.62, 428,028 and 85,628.70

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Solution

The fourth proportional to 285,304.62, 428,028 and 85,628.70 is: 128,464.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,304.62 : 428,028 = 85,628.70 : x
  2. Step 2: Convert to fraction form
    285,304.62/428,028 = 85,628.70/x
  3. Step 3: Cross multiply
    285,304.62x = 428,028 × 85,628.70
  4. Step 4: Simplify right side
    285,304.62x = 36,651,481,203.60
  5. Step 5: Solve for x
    x = 36,651,481,203.60/285,304.62
  6. Step 6: Final answer
    x = 128,464.38

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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.