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Finding the Fourth Proportional to 281,471.16, 388,611.12 and 251,204.72

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Solution

The fourth proportional to 281,471.16, 388,611.12 and 251,204.72 is: 346,823.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,471.16 : 388,611.12 = 251,204.72 : x
  2. Step 2: Convert to fraction form
    281,471.16/388,611.12 = 251,204.72/x
  3. Step 3: Cross multiply
    281,471.16x = 388,611.12 × 251,204.72
  4. Step 4: Simplify right side
    281,471.16x = 97,620,947,588.49
  5. Step 5: Solve for x
    x = 97,620,947,588.49/281,471.16
  6. Step 6: Final answer
    x = 346,823.98

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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.