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Finding the Fourth Proportional to 326,015.94, 488,971.46 and 89,303.28

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Solution

The fourth proportional to 326,015.94, 488,971.46 and 89,303.28 is: 133,940.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,015.94 : 488,971.46 = 89,303.28 : x
  2. Step 2: Convert to fraction form
    326,015.94/488,971.46 = 89,303.28/x
  3. Step 3: Cross multiply
    326,015.94x = 488,971.46 × 89,303.28
  4. Step 4: Simplify right side
    326,015.94x = 43,666,754,757.87
  5. Step 5: Solve for x
    x = 43,666,754,757.87/326,015.94
  6. Step 6: Final answer
    x = 133,940.55

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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.