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Finding the Fourth Proportional to 489,398.52, 674,980.38 and 404,367.96

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Solution

The fourth proportional to 489,398.52, 674,980.38 and 404,367.96 is: 557,705.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,398.52 : 674,980.38 = 404,367.96 : x
  2. Step 2: Convert to fraction form
    489,398.52/674,980.38 = 404,367.96/x
  3. Step 3: Cross multiply
    489,398.52x = 674,980.38 × 404,367.96
  4. Step 4: Simplify right side
    489,398.52x = 272,940,439,300.63
  5. Step 5: Solve for x
    x = 272,940,439,300.63/489,398.52
  6. Step 6: Final answer
    x = 557,705.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.