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Finding the Fourth Proportional to 428,369.67, 642,343.91 and 175,581.63

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Solution

The fourth proportional to 428,369.67, 642,343.91 and 175,581.63 is: 263,286.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,369.67 : 642,343.91 = 175,581.63 : x
  2. Step 2: Convert to fraction form
    428,369.67/642,343.91 = 175,581.63/x
  3. Step 3: Cross multiply
    428,369.67x = 642,343.91 × 175,581.63
  4. Step 4: Simplify right side
    428,369.67x = 112,783,789,860.47
  5. Step 5: Solve for x
    x = 112,783,789,860.47/428,369.67
  6. Step 6: Final answer
    x = 263,286.12

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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.