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Finding the Fourth Proportional to 990.05, 1,483.51 and 804.05

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Solution

The fourth proportional to 990.05, 1,483.51 and 804.05 is: 1,204.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.05 : 1,483.51 = 804.05 : x
  2. Step 2: Convert to fraction form
    990.05/1,483.51 = 804.05/x
  3. Step 3: Cross multiply
    990.05x = 1,483.51 × 804.05
  4. Step 4: Simplify right side
    990.05x = 1,192,808.80
  5. Step 5: Solve for x
    x = 1,192,808.80/990.05
  6. Step 6: Final answer
    x = 1,204.80

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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.