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Finding the Fourth Proportional to 520,048.60, 780,072.90 and 296,099.80

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Solution

The fourth proportional to 520,048.60, 780,072.90 and 296,099.80 is: 444,149.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,048.60 : 780,072.90 = 296,099.80 : x
  2. Step 2: Convert to fraction form
    520,048.60/780,072.90 = 296,099.80/x
  3. Step 3: Cross multiply
    520,048.60x = 780,072.90 × 296,099.80
  4. Step 4: Simplify right side
    520,048.60x = 230,979,429,675.42
  5. Step 5: Solve for x
    x = 230,979,429,675.42/520,048.60
  6. Step 6: Final answer
    x = 444,149.70

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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.