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Finding the Fourth Proportional to 698,711.51, 964,168.78 and 392,739.28

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Solution

The fourth proportional to 698,711.51, 964,168.78 and 392,739.28 is: 541,950.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,711.51 : 964,168.78 = 392,739.28 : x
  2. Step 2: Convert to fraction form
    698,711.51/964,168.78 = 392,739.28/x
  3. Step 3: Cross multiply
    698,711.51x = 964,168.78 × 392,739.28
  4. Step 4: Simplify right side
    698,711.51x = 378,666,945,671.14
  5. Step 5: Solve for x
    x = 378,666,945,671.14/698,711.51
  6. Step 6: Final answer
    x = 541,950.35

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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.