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Finding the Fourth Proportional to 611,966.60, 917,949.73 and 191,242.47

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Solution

The fourth proportional to 611,966.60, 917,949.73 and 191,242.47 is: 286,863.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,966.60 : 917,949.73 = 191,242.47 : x
  2. Step 2: Convert to fraction form
    611,966.60/917,949.73 = 191,242.47/x
  3. Step 3: Cross multiply
    611,966.60x = 917,949.73 × 191,242.47
  4. Step 4: Simplify right side
    611,966.60x = 175,550,973,701.03
  5. Step 5: Solve for x
    x = 175,550,973,701.03/611,966.60
  6. Step 6: Final answer
    x = 286,863.65

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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.