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Finding the Fourth Proportional to 611,851.16, 917,906.75 and 256,660.49

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Solution

The fourth proportional to 611,851.16, 917,906.75 and 256,660.49 is: 385,045.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,851.16 : 917,906.75 = 256,660.49 : x
  2. Step 2: Convert to fraction form
    611,851.16/917,906.75 = 256,660.49/x
  3. Step 3: Cross multiply
    611,851.16x = 917,906.75 × 256,660.49
  4. Step 4: Simplify right side
    611,851.16x = 235,590,394,946.01
  5. Step 5: Solve for x
    x = 235,590,394,946.01/611,851.16
  6. Step 6: Final answer
    x = 385,045.27

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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.