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Finding the Fourth Proportional to 478,880.20, 718,320.30 and 310,918.60

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Solution

The fourth proportional to 478,880.20, 718,320.30 and 310,918.60 is: 466,377.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,880.20 : 718,320.30 = 310,918.60 : x
  2. Step 2: Convert to fraction form
    478,880.20/718,320.30 = 310,918.60/x
  3. Step 3: Cross multiply
    478,880.20x = 718,320.30 × 310,918.60
  4. Step 4: Simplify right side
    478,880.20x = 223,339,142,027.58
  5. Step 5: Solve for x
    x = 223,339,142,027.58/478,880.20
  6. Step 6: Final answer
    x = 466,377.90

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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.