Home / 686,837.21-947,893.56-381,012.12

Finding the Fourth Proportional to 686,837.21, 947,893.56 and 381,012.12

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Solution

The fourth proportional to 686,837.21, 947,893.56 and 381,012.12 is: 525,829.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,837.21 : 947,893.56 = 381,012.12 : x
  2. Step 2: Convert to fraction form
    686,837.21/947,893.56 = 381,012.12/x
  3. Step 3: Cross multiply
    686,837.21x = 947,893.56 × 381,012.12
  4. Step 4: Simplify right side
    686,837.21x = 361,158,934,829.95
  5. Step 5: Solve for x
    x = 361,158,934,829.95/686,837.21
  6. Step 6: Final answer
    x = 525,829.02

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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.