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Finding the Fourth Proportional to 677,143.62, 934,422.21 and 390,646.62

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Solution

The fourth proportional to 677,143.62, 934,422.21 and 390,646.62 is: 539,071.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,143.62 : 934,422.21 = 390,646.62 : x
  2. Step 2: Convert to fraction form
    677,143.62/934,422.21 = 390,646.62/x
  3. Step 3: Cross multiply
    677,143.62x = 934,422.21 × 390,646.62
  4. Step 4: Simplify right side
    677,143.62x = 365,028,877,989.43
  5. Step 5: Solve for x
    x = 365,028,877,989.43/677,143.62
  6. Step 6: Final answer
    x = 539,071.58

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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.