Home / 686,837.70-947,894.25-381,012.62

Finding the Fourth Proportional to 686,837.70, 947,894.25 and 381,012.62

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Solution

The fourth proportional to 686,837.70, 947,894.25 and 381,012.62 is: 525,829.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,837.70 : 947,894.25 = 381,012.62 : x
  2. Step 2: Convert to fraction form
    686,837.70/947,894.25 = 381,012.62/x
  3. Step 3: Cross multiply
    686,837.70x = 947,894.25 × 381,012.62
  4. Step 4: Simplify right side
    686,837.70x = 361,159,671,675.44
  5. Step 5: Solve for x
    x = 361,159,671,675.44/686,837.70
  6. Step 6: Final answer
    x = 525,829.71

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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.