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Finding the Fourth Proportional to 883.51, 1,218.06 and 683.99

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Solution

The fourth proportional to 883.51, 1,218.06 and 683.99 is: 942.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.51 : 1,218.06 = 683.99 : x
  2. Step 2: Convert to fraction form
    883.51/1,218.06 = 683.99/x
  3. Step 3: Cross multiply
    883.51x = 1,218.06 × 683.99
  4. Step 4: Simplify right side
    883.51x = 833,134.77
  5. Step 5: Solve for x
    x = 833,134.77/883.51
  6. Step 6: Final answer
    x = 942.99

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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.