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Finding the Fourth Proportional to 699.90, 1,049.77 and 288.99

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Solution

The fourth proportional to 699.90, 1,049.77 and 288.99 is: 433.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.90 : 1,049.77 = 288.99 : x
  2. Step 2: Convert to fraction form
    699.90/1,049.77 = 288.99/x
  3. Step 3: Cross multiply
    699.90x = 1,049.77 × 288.99
  4. Step 4: Simplify right side
    699.90x = 303,373.39
  5. Step 5: Solve for x
    x = 303,373.39/699.90
  6. Step 6: Final answer
    x = 433.45

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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.