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Finding the Fourth Proportional to 489,412.02, 674,999 and 404,381.46

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Solution

The fourth proportional to 489,412.02, 674,999 and 404,381.46 is: 557,724.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,412.02 : 674,999 = 404,381.46 : x
  2. Step 2: Convert to fraction form
    489,412.02/674,999 = 404,381.46/x
  3. Step 3: Cross multiply
    489,412.02x = 674,999 × 404,381.46
  4. Step 4: Simplify right side
    489,412.02x = 272,957,081,118.54
  5. Step 5: Solve for x
    x = 272,957,081,118.54/489,412.02
  6. Step 6: Final answer
    x = 557,724.51

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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.