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Finding the Fourth Proportional to 686,331.60, 947,172.56 and 380,440.48

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Solution

The fourth proportional to 686,331.60, 947,172.56 and 380,440.48 is: 525,027.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,331.60 : 947,172.56 = 380,440.48 : x
  2. Step 2: Convert to fraction form
    686,331.60/947,172.56 = 380,440.48/x
  3. Step 3: Cross multiply
    686,331.60x = 947,172.56 × 380,440.48
  4. Step 4: Simplify right side
    686,331.60x = 360,342,783,369.23
  5. Step 5: Solve for x
    x = 360,342,783,369.23/686,331.60
  6. Step 6: Final answer
    x = 525,027.24

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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.