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Finding the Fourth Proportional to 518,977.60, 778,466.40 and 462,990.40

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Solution

The fourth proportional to 518,977.60, 778,466.40 and 462,990.40 is: 694,485.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,977.60 : 778,466.40 = 462,990.40 : x
  2. Step 2: Convert to fraction form
    518,977.60/778,466.40 = 462,990.40/x
  3. Step 3: Cross multiply
    518,977.60x = 778,466.40 × 462,990.40
  4. Step 4: Simplify right side
    518,977.60x = 360,422,469,922.56
  5. Step 5: Solve for x
    x = 360,422,469,922.56/518,977.60
  6. Step 6: Final answer
    x = 694,485.60

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Double scale
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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.