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Finding the Fourth Proportional to 677,459.63, 934,892.84 and 390,979.73

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Solution

The fourth proportional to 677,459.63, 934,892.84 and 390,979.73 is: 539,551.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,459.63 : 934,892.84 = 390,979.73 : x
  2. Step 2: Convert to fraction form
    677,459.63/934,892.84 = 390,979.73/x
  3. Step 3: Cross multiply
    677,459.63x = 934,892.84 × 390,979.73
  4. Step 4: Simplify right side
    677,459.63x = 365,524,153,476.82
  5. Step 5: Solve for x
    x = 365,524,153,476.82/677,459.63
  6. Step 6: Final answer
    x = 539,551.19

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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.