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Finding the Fourth Proportional to 489,387.18, 734,348.35 and 189,879.59

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Solution

The fourth proportional to 489,387.18, 734,348.35 and 189,879.59 is: 284,923.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,387.18 : 734,348.35 = 189,879.59 : x
  2. Step 2: Convert to fraction form
    489,387.18/734,348.35 = 189,879.59/x
  3. Step 3: Cross multiply
    489,387.18x = 734,348.35 × 189,879.59
  4. Step 4: Simplify right side
    489,387.18x = 139,437,760,489.62
  5. Step 5: Solve for x
    x = 139,437,760,489.62/489,387.18
  6. Step 6: Final answer
    x = 284,923.20

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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.