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Finding the Fourth Proportional to 666,186.78, 919,637.98 and 424,793.82

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Solution

The fourth proportional to 666,186.78, 919,637.98 and 424,793.82 is: 586,406.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,186.78 : 919,637.98 = 424,793.82 : x
  2. Step 2: Convert to fraction form
    666,186.78/919,637.98 = 424,793.82/x
  3. Step 3: Cross multiply
    666,186.78x = 919,637.98 × 424,793.82
  4. Step 4: Simplify right side
    666,186.78x = 390,656,530,541.28
  5. Step 5: Solve for x
    x = 390,656,530,541.28/666,186.78
  6. Step 6: Final answer
    x = 586,406.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.