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Finding the Fourth Proportional to 988.19, 1,363.19 and 801.89

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Solution

The fourth proportional to 988.19, 1,363.19 and 801.89 is: 1,106.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.19 : 1,363.19 = 801.89 : x
  2. Step 2: Convert to fraction form
    988.19/1,363.19 = 801.89/x
  3. Step 3: Cross multiply
    988.19x = 1,363.19 × 801.89
  4. Step 4: Simplify right side
    988.19x = 1,093,117.60
  5. Step 5: Solve for x
    x = 1,093,117.60/988.19
  6. Step 6: Final answer
    x = 1,106.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.