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Finding the Fourth Proportional to 519,274.80, 778,912.20 and 316,321.20

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Solution

The fourth proportional to 519,274.80, 778,912.20 and 316,321.20 is: 474,481.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,274.80 : 778,912.20 = 316,321.20 : x
  2. Step 2: Convert to fraction form
    519,274.80/778,912.20 = 316,321.20/x
  3. Step 3: Cross multiply
    519,274.80x = 778,912.20 × 316,321.20
  4. Step 4: Simplify right side
    519,274.80x = 246,386,441,798.64
  5. Step 5: Solve for x
    x = 246,386,441,798.64/519,274.80
  6. Step 6: Final answer
    x = 474,481.80

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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.