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Finding the Fourth Proportional to 489,173.44, 675,066.72 and 285,218.80

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Solution

The fourth proportional to 489,173.44, 675,066.72 and 285,218.80 is: 393,606.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,173.44 : 675,066.72 = 285,218.80 : x
  2. Step 2: Convert to fraction form
    489,173.44/675,066.72 = 285,218.80/x
  3. Step 3: Cross multiply
    489,173.44x = 675,066.72 × 285,218.80
  4. Step 4: Simplify right side
    489,173.44x = 192,541,719,798.34
  5. Step 5: Solve for x
    x = 192,541,719,798.34/489,173.44
  6. Step 6: Final answer
    x = 393,606.24

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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.