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Finding the Fourth Proportional to 298,988.88, 448,229.31 and 139,157.63

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Solution

The fourth proportional to 298,988.88, 448,229.31 and 139,157.63 is: 208,618.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,988.88 : 448,229.31 = 139,157.63 : x
  2. Step 2: Convert to fraction form
    298,988.88/448,229.31 = 139,157.63/x
  3. Step 3: Cross multiply
    298,988.88x = 448,229.31 × 139,157.63
  4. Step 4: Simplify right side
    298,988.88x = 62,374,528,476.14
  5. Step 5: Solve for x
    x = 62,374,528,476.14/298,988.88
  6. Step 6: Final answer
    x = 208,618.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.