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Finding the Fourth Proportional to 487,064.85, 730,105.20 and 221,016.30

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Solution

The fourth proportional to 487,064.85, 730,105.20 and 221,016.30 is: 331,301.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,064.85 : 730,105.20 = 221,016.30 : x
  2. Step 2: Convert to fraction form
    487,064.85/730,105.20 = 221,016.30/x
  3. Step 3: Cross multiply
    487,064.85x = 730,105.20 × 221,016.30
  4. Step 4: Simplify right side
    487,064.85x = 161,365,149,914.76
  5. Step 5: Solve for x
    x = 161,365,149,914.76/487,064.85
  6. Step 6: Final answer
    x = 331,301.16

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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.