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Finding the Fourth Proportional to 695,071.92, 959,120.28 and 389,105.76

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Solution

The fourth proportional to 695,071.92, 959,120.28 and 389,105.76 is: 536,921.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,071.92 : 959,120.28 = 389,105.76 : x
  2. Step 2: Convert to fraction form
    695,071.92/959,120.28 = 389,105.76/x
  3. Step 3: Cross multiply
    695,071.92x = 959,120.28 × 389,105.76
  4. Step 4: Simplify right side
    695,071.92x = 373,199,225,480.81
  5. Step 5: Solve for x
    x = 373,199,225,480.81/695,071.92
  6. Step 6: Final answer
    x = 536,921.74

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.