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Finding the Fourth Proportional to 686,572.56, 947,500.12 and 380,629.46

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Solution

The fourth proportional to 686,572.56, 947,500.12 and 380,629.46 is: 525,285.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,572.56 : 947,500.12 = 380,629.46 : x
  2. Step 2: Convert to fraction form
    686,572.56/947,500.12 = 380,629.46/x
  3. Step 3: Cross multiply
    686,572.56x = 947,500.12 × 380,629.46
  4. Step 4: Simplify right side
    686,572.56x = 360,646,459,025.54
  5. Step 5: Solve for x
    x = 360,646,459,025.54/686,572.56
  6. Step 6: Final answer
    x = 525,285.28

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1.5x scale

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.