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Finding the Fourth Proportional to 684,064.78, 944,190.18 and 393,712.06

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Solution

The fourth proportional to 684,064.78, 944,190.18 and 393,712.06 is: 543,426.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,064.78 : 944,190.18 = 393,712.06 : x
  2. Step 2: Convert to fraction form
    684,064.78/944,190.18 = 393,712.06/x
  3. Step 3: Cross multiply
    684,064.78x = 944,190.18 × 393,712.06
  4. Step 4: Simplify right side
    684,064.78x = 371,739,060,799.57
  5. Step 5: Solve for x
    x = 371,739,060,799.57/684,064.78
  6. Step 6: Final answer
    x = 543,426.69

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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.