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Finding the Fourth Proportional to 571,107.60, 856,661.40 and 305,686.80

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Solution

The fourth proportional to 571,107.60, 856,661.40 and 305,686.80 is: 458,530.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,107.60 : 856,661.40 = 305,686.80 : x
  2. Step 2: Convert to fraction form
    571,107.60/856,661.40 = 305,686.80/x
  3. Step 3: Cross multiply
    571,107.60x = 856,661.40 × 305,686.80
  4. Step 4: Simplify right side
    571,107.60x = 261,870,082,049.52
  5. Step 5: Solve for x
    x = 261,870,082,049.52/571,107.60
  6. Step 6: Final answer
    x = 458,530.20

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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.