Home / 686,286.28-947,132.58-380,437.48

Finding the Fourth Proportional to 686,286.28, 947,132.58 and 380,437.48

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Solution

The fourth proportional to 686,286.28, 947,132.58 and 380,437.48 is: 525,035.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,286.28 : 947,132.58 = 380,437.48 : x
  2. Step 2: Convert to fraction form
    686,286.28/947,132.58 = 380,437.48/x
  3. Step 3: Cross multiply
    686,286.28x = 947,132.58 × 380,437.48
  4. Step 4: Simplify right side
    686,286.28x = 360,324,731,961.10
  5. Step 5: Solve for x
    x = 360,324,731,961.10/686,286.28
  6. Step 6: Final answer
    x = 525,035.60

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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.