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Finding the Fourth Proportional to 487,149.60, 730,835.10 and 220,986.30

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Solution

The fourth proportional to 487,149.60, 730,835.10 and 220,986.30 is: 331,529.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,149.60 : 730,835.10 = 220,986.30 : x
  2. Step 2: Convert to fraction form
    487,149.60/730,835.10 = 220,986.30/x
  3. Step 3: Cross multiply
    487,149.60x = 730,835.10 × 220,986.30
  4. Step 4: Simplify right side
    487,149.60x = 161,504,544,659.13
  5. Step 5: Solve for x
    x = 161,504,544,659.13/487,149.60
  6. Step 6: Final answer
    x = 331,529.67

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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.