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Finding the Fourth Proportional to 616,856.40, 925,284.60 and 518,878.80

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Solution

The fourth proportional to 616,856.40, 925,284.60 and 518,878.80 is: 778,318.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,856.40 : 925,284.60 = 518,878.80 : x
  2. Step 2: Convert to fraction form
    616,856.40/925,284.60 = 518,878.80/x
  3. Step 3: Cross multiply
    616,856.40x = 925,284.60 × 518,878.80
  4. Step 4: Simplify right side
    616,856.40x = 480,110,562,906.48
  5. Step 5: Solve for x
    x = 480,110,562,906.48/616,856.40
  6. Step 6: Final answer
    x = 778,318.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.