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Finding the Fourth Proportional to 389,494.60, 584,501.10 and 221,014.60

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Solution

The fourth proportional to 389,494.60, 584,501.10 and 221,014.60 is: 331,668.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,494.60 : 584,501.10 = 221,014.60 : x
  2. Step 2: Convert to fraction form
    389,494.60/584,501.10 = 221,014.60/x
  3. Step 3: Cross multiply
    389,494.60x = 584,501.10 × 221,014.60
  4. Step 4: Simplify right side
    389,494.60x = 129,183,276,816.06
  5. Step 5: Solve for x
    x = 129,183,276,816.06/389,494.60
  6. Step 6: Final answer
    x = 331,668.98

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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.