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Finding the Fourth Proportional to 686,551.53, 947,471.07 and 380,608.46

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Solution

The fourth proportional to 686,551.53, 947,471.07 and 380,608.46 is: 525,256.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,551.53 : 947,471.07 = 380,608.46 : x
  2. Step 2: Convert to fraction form
    686,551.53/947,471.07 = 380,608.46/x
  3. Step 3: Cross multiply
    686,551.53x = 947,471.07 × 380,608.46
  4. Step 4: Simplify right side
    686,551.53x = 360,615,504,847.25
  5. Step 5: Solve for x
    x = 360,615,504,847.25/686,551.53
  6. Step 6: Final answer
    x = 525,256.28

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Double scale
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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.