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Finding the Fourth Proportional to 281,990.85, 389,144.70 and 154,666.95

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Solution

The fourth proportional to 281,990.85, 389,144.70 and 154,666.95 is: 213,438.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,990.85 : 389,144.70 = 154,666.95 : x
  2. Step 2: Convert to fraction form
    281,990.85/389,144.70 = 154,666.95/x
  3. Step 3: Cross multiply
    281,990.85x = 389,144.70 × 154,666.95
  4. Step 4: Simplify right side
    281,990.85x = 60,187,823,857.67
  5. Step 5: Solve for x
    x = 60,187,823,857.67/281,990.85
  6. Step 6: Final answer
    x = 213,438.92

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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.