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Finding the Fourth Proportional to 478,821.20, 718,231.80 and 310,859.60

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Solution

The fourth proportional to 478,821.20, 718,231.80 and 310,859.60 is: 466,289.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,821.20 : 718,231.80 = 310,859.60 : x
  2. Step 2: Convert to fraction form
    478,821.20/718,231.80 = 310,859.60/x
  3. Step 3: Cross multiply
    478,821.20x = 718,231.80 × 310,859.60
  4. Step 4: Simplify right side
    478,821.20x = 223,269,250,055.28
  5. Step 5: Solve for x
    x = 223,269,250,055.28/478,821.20
  6. Step 6: Final answer
    x = 466,289.40

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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.