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Finding the Fourth Proportional to 489,968.52, 675,985.84 and 308,696.64

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Solution

The fourth proportional to 489,968.52, 675,985.84 and 308,696.64 is: 425,893.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,968.52 : 675,985.84 = 308,696.64 : x
  2. Step 2: Convert to fraction form
    489,968.52/675,985.84 = 308,696.64/x
  3. Step 3: Cross multiply
    489,968.52x = 675,985.84 × 308,696.64
  4. Step 4: Simplify right side
    489,968.52x = 208,674,557,495.58
  5. Step 5: Solve for x
    x = 208,674,557,495.58/489,968.52
  6. Step 6: Final answer
    x = 425,893.81

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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.