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Finding the Fourth Proportional to 625,408.32, 863,064.23 and 338,928.40

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Solution

The fourth proportional to 625,408.32, 863,064.23 and 338,928.40 is: 467,721.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,408.32 : 863,064.23 = 338,928.40 : x
  2. Step 2: Convert to fraction form
    625,408.32/863,064.23 = 338,928.40/x
  3. Step 3: Cross multiply
    625,408.32x = 863,064.23 × 338,928.40
  4. Step 4: Simplify right side
    625,408.32x = 292,516,977,955.32
  5. Step 5: Solve for x
    x = 292,516,977,955.32/625,408.32
  6. Step 6: Final answer
    x = 467,721.60

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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.