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Finding the Fourth Proportional to 285,358.72, 428,066.38 and 105,491.27

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Solution

The fourth proportional to 285,358.72, 428,066.38 and 105,491.27 is: 158,247.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,358.72 : 428,066.38 = 105,491.27 : x
  2. Step 2: Convert to fraction form
    285,358.72/428,066.38 = 105,491.27/x
  3. Step 3: Cross multiply
    285,358.72x = 428,066.38 × 105,491.27
  4. Step 4: Simplify right side
    285,358.72x = 45,157,263,930.17
  5. Step 5: Solve for x
    x = 45,157,263,930.17/285,358.72
  6. Step 6: Final answer
    x = 158,247.36

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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.