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Finding the Fourth Proportional to 520,122.60, 780,183.90 and 146,145.60

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Solution

The fourth proportional to 520,122.60, 780,183.90 and 146,145.60 is: 219,218.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,122.60 : 780,183.90 = 146,145.60 : x
  2. Step 2: Convert to fraction form
    520,122.60/780,183.90 = 146,145.60/x
  3. Step 3: Cross multiply
    520,122.60x = 780,183.90 × 146,145.60
  4. Step 4: Simplify right side
    520,122.60x = 114,020,444,175.84
  5. Step 5: Solve for x
    x = 114,020,444,175.84/520,122.60
  6. Step 6: Final answer
    x = 219,218.40

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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.