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Finding the Fourth Proportional to 326,656, 489,984 and 105,040

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Solution

The fourth proportional to 326,656, 489,984 and 105,040 is: 157,560

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,656 : 489,984 = 105,040 : x
  2. Step 2: Convert to fraction form
    326,656/489,984 = 105,040/x
  3. Step 3: Cross multiply
    326,656x = 489,984 × 105,040
  4. Step 4: Simplify right side
    326,656x = 51,467,919,360
  5. Step 5: Solve for x
    x = 51,467,919,360/326,656
  6. Step 6: Final answer
    x = 157,560

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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.