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Finding the Fourth Proportional to 990.95, 1,493.02 and 897.19

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Solution

The fourth proportional to 990.95, 1,493.02 and 897.19 is: 1,351.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.95 : 1,493.02 = 897.19 : x
  2. Step 2: Convert to fraction form
    990.95/1,493.02 = 897.19/x
  3. Step 3: Cross multiply
    990.95x = 1,493.02 × 897.19
  4. Step 4: Simplify right side
    990.95x = 1,339,510.66
  5. Step 5: Solve for x
    x = 1,339,510.66/990.95
  6. Step 6: Final answer
    x = 1,351.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.