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Finding the Fourth Proportional to 611,965.60, 917,948.23 and 191,241.47

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Solution

The fourth proportional to 611,965.60, 917,948.23 and 191,241.47 is: 286,862.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,965.60 : 917,948.23 = 191,241.47 : x
  2. Step 2: Convert to fraction form
    611,965.60/917,948.23 = 191,241.47/x
  3. Step 3: Cross multiply
    611,965.60x = 917,948.23 × 191,241.47
  4. Step 4: Simplify right side
    611,965.60x = 175,549,770,705.87
  5. Step 5: Solve for x
    x = 175,549,770,705.87/611,965.60
  6. Step 6: Final answer
    x = 286,862.16

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1.5x scale

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.