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Finding the Fourth Proportional to 893.13, 1,329.93 and 860.33

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Solution

The fourth proportional to 893.13, 1,329.93 and 860.33 is: 1,281.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.13 : 1,329.93 = 860.33 : x
  2. Step 2: Convert to fraction form
    893.13/1,329.93 = 860.33/x
  3. Step 3: Cross multiply
    893.13x = 1,329.93 × 860.33
  4. Step 4: Simplify right side
    893.13x = 1,144,172.03
  5. Step 5: Solve for x
    x = 1,144,172.03/893.13
  6. Step 6: Final answer
    x = 1,281.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.