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Finding the Fourth Proportional to 262,722, 362,556.40 and 143,490

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Solution

The fourth proportional to 262,722, 362,556.40 and 143,490 is: 198,016.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,722 : 362,556.40 = 143,490 : x
  2. Step 2: Convert to fraction form
    262,722/362,556.40 = 143,490/x
  3. Step 3: Cross multiply
    262,722x = 362,556.40 × 143,490
  4. Step 4: Simplify right side
    262,722x = 52,023,217,836
  5. Step 5: Solve for x
    x = 52,023,217,836/262,722
  6. Step 6: Final answer
    x = 198,016.22

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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.