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Finding the Fourth Proportional to 371,987.44, 513,346.31 and 202,225.21

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Solution

The fourth proportional to 371,987.44, 513,346.31 and 202,225.21 is: 279,072.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,987.44 : 513,346.31 = 202,225.21 : x
  2. Step 2: Convert to fraction form
    371,987.44/513,346.31 = 202,225.21/x
  3. Step 3: Cross multiply
    371,987.44x = 513,346.31 × 202,225.21
  4. Step 4: Simplify right side
    371,987.44x = 103,811,563,806.33
  5. Step 5: Solve for x
    x = 103,811,563,806.33/371,987.44
  6. Step 6: Final answer
    x = 279,072.77

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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.