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Finding the Fourth Proportional to 339,291.20, 508,936.80 and 313,630.40

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Solution

The fourth proportional to 339,291.20, 508,936.80 and 313,630.40 is: 470,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,291.20 : 508,936.80 = 313,630.40 : x
  2. Step 2: Convert to fraction form
    339,291.20/508,936.80 = 313,630.40/x
  3. Step 3: Cross multiply
    339,291.20x = 508,936.80 × 313,630.40
  4. Step 4: Simplify right side
    339,291.20x = 159,618,052,158.72
  5. Step 5: Solve for x
    x = 159,618,052,158.72/339,291.20
  6. Step 6: Final answer
    x = 470,445.60

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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.