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Finding the Fourth Proportional to 719,478.18, 992,853.81 and 397,181.34

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Solution

The fourth proportional to 719,478.18, 992,853.81 and 397,181.34 is: 548,095.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,478.18 : 992,853.81 = 397,181.34 : x
  2. Step 2: Convert to fraction form
    719,478.18/992,853.81 = 397,181.34/x
  3. Step 3: Cross multiply
    719,478.18x = 992,853.81 × 397,181.34
  4. Step 4: Simplify right side
    719,478.18x = 394,343,006,679.91
  5. Step 5: Solve for x
    x = 394,343,006,679.91/719,478.18
  6. Step 6: Final answer
    x = 548,095.85

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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.