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Finding the Fourth Proportional to 1,230,978.60, 1,846,640.70 and 389,442.60

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Solution

The fourth proportional to 1,230,978.60, 1,846,640.70 and 389,442.60 is: 584,218.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230,978.60 : 1,846,640.70 = 389,442.60 : x
  2. Step 2: Convert to fraction form
    1,230,978.60/1,846,640.70 = 389,442.60/x
  3. Step 3: Cross multiply
    1,230,978.60x = 1,846,640.70 × 389,442.60
  4. Step 4: Simplify right side
    1,230,978.60x = 719,160,555,473.82
  5. Step 5: Solve for x
    x = 719,160,555,473.82/1,230,978.60
  6. Step 6: Final answer
    x = 584,218.57

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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.