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Finding the Fourth Proportional to 698,712.51, 964,170.15 and 392,740.28

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Solution

The fourth proportional to 698,712.51, 964,170.15 and 392,740.28 is: 541,951.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,712.51 : 964,170.15 = 392,740.28 : x
  2. Step 2: Convert to fraction form
    698,712.51/964,170.15 = 392,740.28/x
  3. Step 3: Cross multiply
    698,712.51x = 964,170.15 × 392,740.28
  4. Step 4: Simplify right side
    698,712.51x = 378,668,454,678.64
  5. Step 5: Solve for x
    x = 378,668,454,678.64/698,712.51
  6. Step 6: Final answer
    x = 541,951.73

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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.