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Finding the Fourth Proportional to 281,929, 389,026.26 and 154,571.08

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Solution

The fourth proportional to 281,929, 389,026.26 and 154,571.08 is: 213,288.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,929 : 389,026.26 = 154,571.08 : x
  2. Step 2: Convert to fraction form
    281,929/389,026.26 = 154,571.08/x
  3. Step 3: Cross multiply
    281,929x = 389,026.26 × 154,571.08
  4. Step 4: Simplify right side
    281,929x = 60,132,209,156.56
  5. Step 5: Solve for x
    x = 60,132,209,156.56/281,929
  6. Step 6: Final answer
    x = 213,288.48

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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.