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Finding the Fourth Proportional to 1,047.84, 1,442.73 and 890.16

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Solution

The fourth proportional to 1,047.84, 1,442.73 and 890.16 is: 1,225.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.84 : 1,442.73 = 890.16 : x
  2. Step 2: Convert to fraction form
    1,047.84/1,442.73 = 890.16/x
  3. Step 3: Cross multiply
    1,047.84x = 1,442.73 × 890.16
  4. Step 4: Simplify right side
    1,047.84x = 1,284,260.54
  5. Step 5: Solve for x
    x = 1,284,260.54/1,047.84
  6. Step 6: Final answer
    x = 1,225.63

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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.