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Finding the Fourth Proportional to 324,386.88, 486,684.40 and 155,919.43

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Solution

The fourth proportional to 324,386.88, 486,684.40 and 155,919.43 is: 233,929.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,386.88 : 486,684.40 = 155,919.43 : x
  2. Step 2: Convert to fraction form
    324,386.88/486,684.40 = 155,919.43/x
  3. Step 3: Cross multiply
    324,386.88x = 486,684.40 × 155,919.43
  4. Step 4: Simplify right side
    324,386.88x = 75,883,554,237.89
  5. Step 5: Solve for x
    x = 75,883,554,237.89/324,386.88
  6. Step 6: Final answer
    x = 233,929.17

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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.