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Finding the Fourth Proportional to 611,853.76, 917,910.28 and 191,161.36

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Solution

The fourth proportional to 611,853.76, 917,910.28 and 191,161.36 is: 286,782.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,853.76 : 917,910.28 = 191,161.36 : x
  2. Step 2: Convert to fraction form
    611,853.76/917,910.28 = 191,161.36/x
  3. Step 3: Cross multiply
    611,853.76x = 917,910.28 × 191,161.36
  4. Step 4: Simplify right side
    611,853.76x = 175,468,977,482.78
  5. Step 5: Solve for x
    x = 175,468,977,482.78/611,853.76
  6. Step 6: Final answer
    x = 286,782.54

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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.