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Finding the Fourth Proportional to 686,241.60, 947,001.96 and 376,141.20

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Solution

The fourth proportional to 686,241.60, 947,001.96 and 376,141.20 is: 519,068.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,241.60 : 947,001.96 = 376,141.20 : x
  2. Step 2: Convert to fraction form
    686,241.60/947,001.96 = 376,141.20/x
  3. Step 3: Cross multiply
    686,241.60x = 947,001.96 × 376,141.20
  4. Step 4: Simplify right side
    686,241.60x = 356,206,453,636.75
  5. Step 5: Solve for x
    x = 356,206,453,636.75/686,241.60
  6. Step 6: Final answer
    x = 519,068.58

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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.