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Finding the Fourth Proportional to 509,991.30, 764,986.95 and 307,037.70

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Solution

The fourth proportional to 509,991.30, 764,986.95 and 307,037.70 is: 460,556.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,991.30 : 764,986.95 = 307,037.70 : x
  2. Step 2: Convert to fraction form
    509,991.30/764,986.95 = 307,037.70/x
  3. Step 3: Cross multiply
    509,991.30x = 764,986.95 × 307,037.70
  4. Step 4: Simplify right side
    509,991.30x = 234,879,833,658.02
  5. Step 5: Solve for x
    x = 234,879,833,658.02/509,991.30
  6. Step 6: Final answer
    x = 460,556.55

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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.