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Finding the Fourth Proportional to 995.48, 1,491.60 and 705.50

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Solution

The fourth proportional to 995.48, 1,491.60 and 705.50 is: 1,057.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.48 : 1,491.60 = 705.50 : x
  2. Step 2: Convert to fraction form
    995.48/1,491.60 = 705.50/x
  3. Step 3: Cross multiply
    995.48x = 1,491.60 × 705.50
  4. Step 4: Simplify right side
    995.48x = 1,052,323.80
  5. Step 5: Solve for x
    x = 1,052,323.80/995.48
  6. Step 6: Final answer
    x = 1,057.10

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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.