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Finding the Fourth Proportional to 660,686.05, 911,874.56 and 430,844.30

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Solution

The fourth proportional to 660,686.05, 911,874.56 and 430,844.30 is: 594,648.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,686.05 : 911,874.56 = 430,844.30 : x
  2. Step 2: Convert to fraction form
    660,686.05/911,874.56 = 430,844.30/x
  3. Step 3: Cross multiply
    660,686.05x = 911,874.56 × 430,844.30
  4. Step 4: Simplify right side
    660,686.05x = 392,875,949,777.41
  5. Step 5: Solve for x
    x = 392,875,949,777.41/660,686.05
  6. Step 6: Final answer
    x = 594,648.47

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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.