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Finding the Fourth Proportional to 677,458.06, 934,625.41 and 390,922.78

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Solution

The fourth proportional to 677,458.06, 934,625.41 and 390,922.78 is: 539,319.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,458.06 : 934,625.41 = 390,922.78 : x
  2. Step 2: Convert to fraction form
    677,458.06/934,625.41 = 390,922.78/x
  3. Step 3: Cross multiply
    677,458.06x = 934,625.41 × 390,922.78
  4. Step 4: Simplify right side
    677,458.06x = 365,366,363,535.84
  5. Step 5: Solve for x
    x = 365,366,363,535.84/677,458.06
  6. Step 6: Final answer
    x = 539,319.53

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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.