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Finding the Fourth Proportional to 652,138.30, 978,207.45 and 561,936.70

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Solution

The fourth proportional to 652,138.30, 978,207.45 and 561,936.70 is: 842,905.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,138.30 : 978,207.45 = 561,936.70 : x
  2. Step 2: Convert to fraction form
    652,138.30/978,207.45 = 561,936.70/x
  3. Step 3: Cross multiply
    652,138.30x = 978,207.45 × 561,936.70
  4. Step 4: Simplify right side
    652,138.30x = 549,690,666,368.42
  5. Step 5: Solve for x
    x = 549,690,666,368.42/652,138.30
  6. Step 6: Final answer
    x = 842,905.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.