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Finding the Fourth Proportional to 686,804.28, 947,792.47 and 380,908.94

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Solution

The fourth proportional to 686,804.28, 947,792.47 and 380,908.94 is: 525,655.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,804.28 : 947,792.47 = 380,908.94 : x
  2. Step 2: Convert to fraction form
    686,804.28/947,792.47 = 380,908.94/x
  3. Step 3: Cross multiply
    686,804.28x = 947,792.47 × 380,908.94
  4. Step 4: Simplify right side
    686,804.28x = 361,022,622,116.20
  5. Step 5: Solve for x
    x = 361,022,622,116.20/686,804.28
  6. Step 6: Final answer
    x = 525,655.75

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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.