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Finding the Fourth Proportional to 382,991.39, 528,447.99 and 221,836.82

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Solution

The fourth proportional to 382,991.39, 528,447.99 and 221,836.82 is: 306,088.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,991.39 : 528,447.99 = 221,836.82 : x
  2. Step 2: Convert to fraction form
    382,991.39/528,447.99 = 221,836.82/x
  3. Step 3: Cross multiply
    382,991.39x = 528,447.99 × 221,836.82
  4. Step 4: Simplify right side
    382,991.39x = 117,229,221,636.99
  5. Step 5: Solve for x
    x = 117,229,221,636.99/382,991.39
  6. Step 6: Final answer
    x = 306,088.40

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1.5x scale

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.