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Finding the Fourth Proportional to 611,564.60, 917,346.90 and 190,785.80

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Solution

The fourth proportional to 611,564.60, 917,346.90 and 190,785.80 is: 286,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,564.60 : 917,346.90 = 190,785.80 : x
  2. Step 2: Convert to fraction form
    611,564.60/917,346.90 = 190,785.80/x
  3. Step 3: Cross multiply
    611,564.60x = 917,346.90 × 190,785.80
  4. Step 4: Simplify right side
    611,564.60x = 175,016,762,194.02
  5. Step 5: Solve for x
    x = 175,016,762,194.02/611,564.60
  6. Step 6: Final answer
    x = 286,178.70

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Similar ratio
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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.