Home / 686,986.36-947,973.42-381,057.40

Finding the Fourth Proportional to 686,986.36, 947,973.42 and 381,057.40

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Solution

The fourth proportional to 686,986.36, 947,973.42 and 381,057.40 is: 525,821.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,986.36 : 947,973.42 = 381,057.40 : x
  2. Step 2: Convert to fraction form
    686,986.36/947,973.42 = 381,057.40/x
  3. Step 3: Cross multiply
    686,986.36x = 947,973.42 × 381,057.40
  4. Step 4: Simplify right side
    686,986.36x = 361,232,286,694.31
  5. Step 5: Solve for x
    x = 361,232,286,694.31/686,986.36
  6. Step 6: Final answer
    x = 525,821.63

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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.