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Finding the Fourth Proportional to 478,976.20, 718,464.30 and 360,003.40

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Solution

The fourth proportional to 478,976.20, 718,464.30 and 360,003.40 is: 540,005.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,976.20 : 718,464.30 = 360,003.40 : x
  2. Step 2: Convert to fraction form
    478,976.20/718,464.30 = 360,003.40/x
  3. Step 3: Cross multiply
    478,976.20x = 718,464.30 × 360,003.40
  4. Step 4: Simplify right side
    478,976.20x = 258,649,590,778.62
  5. Step 5: Solve for x
    x = 258,649,590,778.62/478,976.20
  6. Step 6: Final answer
    x = 540,005.10

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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.