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Finding the Fourth Proportional to 333,998.86, 500,991 and 81,280.48

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Solution

The fourth proportional to 333,998.86, 500,991 and 81,280.48 is: 121,918.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,998.86 : 500,991 = 81,280.48 : x
  2. Step 2: Convert to fraction form
    333,998.86/500,991 = 81,280.48/x
  3. Step 3: Cross multiply
    333,998.86x = 500,991 × 81,280.48
  4. Step 4: Simplify right side
    333,998.86x = 40,720,788,955.68
  5. Step 5: Solve for x
    x = 40,720,788,955.68/333,998.86
  6. Step 6: Final answer
    x = 121,918.95

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1.5x scale

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.