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Finding the Fourth Proportional to 995.88, 1,490.40 and 706.80

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Solution

The fourth proportional to 995.88, 1,490.40 and 706.80 is: 1,057.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.88 : 1,490.40 = 706.80 : x
  2. Step 2: Convert to fraction form
    995.88/1,490.40 = 706.80/x
  3. Step 3: Cross multiply
    995.88x = 1,490.40 × 706.80
  4. Step 4: Simplify right side
    995.88x = 1,053,414.72
  5. Step 5: Solve for x
    x = 1,053,414.72/995.88
  6. Step 6: Final answer
    x = 1,057.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.