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Finding the Fourth Proportional to 1,045.19, 1,556.86 and 997.81

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Solution

The fourth proportional to 1,045.19, 1,556.86 and 997.81 is: 1,486.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.19 : 1,556.86 = 997.81 : x
  2. Step 2: Convert to fraction form
    1,045.19/1,556.86 = 997.81/x
  3. Step 3: Cross multiply
    1,045.19x = 1,556.86 × 997.81
  4. Step 4: Simplify right side
    1,045.19x = 1,553,450.48
  5. Step 5: Solve for x
    x = 1,553,450.48/1,045.19
  6. Step 6: Final answer
    x = 1,486.29

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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.