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Finding the Fourth Proportional to 520,194.60, 780,291.90 and 146,217.60

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Solution

The fourth proportional to 520,194.60, 780,291.90 and 146,217.60 is: 219,326.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,194.60 : 780,291.90 = 146,217.60 : x
  2. Step 2: Convert to fraction form
    520,194.60/780,291.90 = 146,217.60/x
  3. Step 3: Cross multiply
    520,194.60x = 780,291.90 × 146,217.60
  4. Step 4: Simplify right side
    520,194.60x = 114,092,408,917.44
  5. Step 5: Solve for x
    x = 114,092,408,917.44/520,194.60
  6. Step 6: Final answer
    x = 219,326.40

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Double scale
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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.