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Finding the Fourth Proportional to 799.97, 1,199.95 and 214.99

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Solution

The fourth proportional to 799.97, 1,199.95 and 214.99 is: 322.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.97 : 1,199.95 = 214.99 : x
  2. Step 2: Convert to fraction form
    799.97/1,199.95 = 214.99/x
  3. Step 3: Cross multiply
    799.97x = 1,199.95 × 214.99
  4. Step 4: Simplify right side
    799.97x = 257,973.71
  5. Step 5: Solve for x
    x = 257,973.71/799.97
  6. Step 6: Final answer
    x = 322.48

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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.