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Finding the Fourth Proportional to 611,412.10, 917,118.15 and 190,687.30

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Solution

The fourth proportional to 611,412.10, 917,118.15 and 190,687.30 is: 286,030.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,412.10 : 917,118.15 = 190,687.30 : x
  2. Step 2: Convert to fraction form
    611,412.10/917,118.15 = 190,687.30/x
  3. Step 3: Cross multiply
    611,412.10x = 917,118.15 × 190,687.30
  4. Step 4: Simplify right side
    611,412.10x = 174,882,783,804.50
  5. Step 5: Solve for x
    x = 174,882,783,804.50/611,412.10
  6. Step 6: Final answer
    x = 286,030.95

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Double scale
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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.