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Finding the Fourth Proportional to 995.70, 1,492.20 and 579.45

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Solution

The fourth proportional to 995.70, 1,492.20 and 579.45 is: 868.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.70 : 1,492.20 = 579.45 : x
  2. Step 2: Convert to fraction form
    995.70/1,492.20 = 579.45/x
  3. Step 3: Cross multiply
    995.70x = 1,492.20 × 579.45
  4. Step 4: Simplify right side
    995.70x = 864,655.29
  5. Step 5: Solve for x
    x = 864,655.29/995.70
  6. Step 6: Final answer
    x = 868.39

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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.