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Finding the Fourth Proportional to 611,005.90, 916,836.90 and 256,055.80

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Solution

The fourth proportional to 611,005.90, 916,836.90 and 256,055.80 is: 384,221.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,005.90 : 916,836.90 = 256,055.80 : x
  2. Step 2: Convert to fraction form
    611,005.90/916,836.90 = 256,055.80/x
  3. Step 3: Cross multiply
    611,005.90x = 916,836.90 × 256,055.80
  4. Step 4: Simplify right side
    611,005.90x = 234,761,405,899.02
  5. Step 5: Solve for x
    x = 234,761,405,899.02/611,005.90
  6. Step 6: Final answer
    x = 384,221.18

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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.