Home / 686,989.36-947,977.56-381,060.40

Finding the Fourth Proportional to 686,989.36, 947,977.56 and 381,060.40

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Solution

The fourth proportional to 686,989.36, 947,977.56 and 381,060.40 is: 525,825.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,989.36 : 947,977.56 = 381,060.40 : x
  2. Step 2: Convert to fraction form
    686,989.36/947,977.56 = 381,060.40/x
  3. Step 3: Cross multiply
    686,989.36x = 947,977.56 × 381,060.40
  4. Step 4: Simplify right side
    686,989.36x = 361,236,708,204.62
  5. Step 5: Solve for x
    x = 361,236,708,204.62/686,989.36
  6. Step 6: Final answer
    x = 525,825.77

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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.