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Finding the Fourth Proportional to 571,231.20, 856,846.80 and 479,992.80

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Solution

The fourth proportional to 571,231.20, 856,846.80 and 479,992.80 is: 719,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,231.20 : 856,846.80 = 479,992.80 : x
  2. Step 2: Convert to fraction form
    571,231.20/856,846.80 = 479,992.80/x
  3. Step 3: Cross multiply
    571,231.20x = 856,846.80 × 479,992.80
  4. Step 4: Simplify right side
    571,231.20x = 411,280,294,703.04
  5. Step 5: Solve for x
    x = 411,280,294,703.04/571,231.20
  6. Step 6: Final answer
    x = 719,989.20

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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.