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Finding the Fourth Proportional to 677,458.56, 934,626.10 and 390,923.29

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Solution

The fourth proportional to 677,458.56, 934,626.10 and 390,923.29 is: 539,320.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,458.56 : 934,626.10 = 390,923.29 : x
  2. Step 2: Convert to fraction form
    677,458.56/934,626.10 = 390,923.29/x
  3. Step 3: Cross multiply
    677,458.56x = 934,626.10 × 390,923.29
  4. Step 4: Simplify right side
    677,458.56x = 365,367,109,931.87
  5. Step 5: Solve for x
    x = 365,367,109,931.87/677,458.56
  6. Step 6: Final answer
    x = 539,320.24

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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.