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Finding the Fourth Proportional to 648,016.80, 972,025.20 and 396,074.40

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Solution

The fourth proportional to 648,016.80, 972,025.20 and 396,074.40 is: 594,111.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,016.80 : 972,025.20 = 396,074.40 : x
  2. Step 2: Convert to fraction form
    648,016.80/972,025.20 = 396,074.40/x
  3. Step 3: Cross multiply
    648,016.80x = 972,025.20 × 396,074.40
  4. Step 4: Simplify right side
    648,016.80x = 384,994,297,874.88
  5. Step 5: Solve for x
    x = 384,994,297,874.88/648,016.80
  6. Step 6: Final answer
    x = 594,111.60

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Half scale
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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.