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Finding the Fourth Proportional to 611,456.78, 916,186.38 and 371,644.04

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Solution

The fourth proportional to 611,456.78, 916,186.38 and 371,644.04 is: 556,858.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,456.78 : 916,186.38 = 371,644.04 : x
  2. Step 2: Convert to fraction form
    611,456.78/916,186.38 = 371,644.04/x
  3. Step 3: Cross multiply
    611,456.78x = 916,186.38 × 371,644.04
  4. Step 4: Simplify right side
    611,456.78x = 340,495,207,656.18
  5. Step 5: Solve for x
    x = 340,495,207,656.18/611,456.78
  6. Step 6: Final answer
    x = 556,858.99

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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.