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Finding the Fourth Proportional to 281,814.42, 388,894.86 and 154,487.28

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Solution

The fourth proportional to 281,814.42, 388,894.86 and 154,487.28 is: 213,187.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,814.42 : 388,894.86 = 154,487.28 : x
  2. Step 2: Convert to fraction form
    281,814.42/388,894.86 = 154,487.28/x
  3. Step 3: Cross multiply
    281,814.42x = 388,894.86 × 154,487.28
  4. Step 4: Simplify right side
    281,814.42x = 60,079,309,127.38
  5. Step 5: Solve for x
    x = 60,079,309,127.38/281,814.42
  6. Step 6: Final answer
    x = 213,187.49

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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.