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Finding the Fourth Proportional to 389,806.20, 584,709.30 and 366,186.60

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Solution

The fourth proportional to 389,806.20, 584,709.30 and 366,186.60 is: 549,279.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,806.20 : 584,709.30 = 366,186.60 : x
  2. Step 2: Convert to fraction form
    389,806.20/584,709.30 = 366,186.60/x
  3. Step 3: Cross multiply
    389,806.20x = 584,709.30 × 366,186.60
  4. Step 4: Simplify right side
    389,806.20x = 214,112,710,555.38
  5. Step 5: Solve for x
    x = 214,112,710,555.38/389,806.20
  6. Step 6: Final answer
    x = 549,279.90

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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.