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Finding the Fourth Proportional to 281,920.48, 389,055.60 and 154,588.48

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Solution

The fourth proportional to 281,920.48, 389,055.60 and 154,588.48 is: 213,335.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,920.48 : 389,055.60 = 154,588.48 : x
  2. Step 2: Convert to fraction form
    281,920.48/389,055.60 = 154,588.48/x
  3. Step 3: Cross multiply
    281,920.48x = 389,055.60 × 154,588.48
  4. Step 4: Simplify right side
    281,920.48x = 60,143,513,839.49
  5. Step 5: Solve for x
    x = 60,143,513,839.49/281,920.48
  6. Step 6: Final answer
    x = 213,335.03

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1.5x scale

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.