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Finding the Fourth Proportional to 611,780.80, 917,800.80 and 185,281.60

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Solution

The fourth proportional to 611,780.80, 917,800.80 and 185,281.60 is: 277,961.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,780.80 : 917,800.80 = 185,281.60 : x
  2. Step 2: Convert to fraction form
    611,780.80/917,800.80 = 185,281.60/x
  3. Step 3: Cross multiply
    611,780.80x = 917,800.80 × 185,281.60
  4. Step 4: Simplify right side
    611,780.80x = 170,051,600,705.28
  5. Step 5: Solve for x
    x = 170,051,600,705.28/611,780.80
  6. Step 6: Final answer
    x = 277,961.65

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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.