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Finding the Fourth Proportional to 285,555.90, 428,334.81 and 72,323.73

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Solution

The fourth proportional to 285,555.90, 428,334.81 and 72,323.73 is: 108,485.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,555.90 : 428,334.81 = 72,323.73 : x
  2. Step 2: Convert to fraction form
    285,555.90/428,334.81 = 72,323.73/x
  3. Step 3: Cross multiply
    285,555.90x = 428,334.81 × 72,323.73
  4. Step 4: Simplify right side
    285,555.90x = 30,978,771,148.04
  5. Step 5: Solve for x
    x = 30,978,771,148.04/285,555.90
  6. Step 6: Final answer
    x = 108,485.84

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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.