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Finding the Fourth Proportional to 699.12, 1,048.02 and 369.99

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Solution

The fourth proportional to 699.12, 1,048.02 and 369.99 is: 554.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.12 : 1,048.02 = 369.99 : x
  2. Step 2: Convert to fraction form
    699.12/1,048.02 = 369.99/x
  3. Step 3: Cross multiply
    699.12x = 1,048.02 × 369.99
  4. Step 4: Simplify right side
    699.12x = 387,756.92
  5. Step 5: Solve for x
    x = 387,756.92/699.12
  6. Step 6: Final answer
    x = 554.64

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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.