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Finding the Fourth Proportional to 995.03, 1,491.67 and 378.57

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Solution

The fourth proportional to 995.03, 1,491.67 and 378.57 is: 567.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.03 : 1,491.67 = 378.57 : x
  2. Step 2: Convert to fraction form
    995.03/1,491.67 = 378.57/x
  3. Step 3: Cross multiply
    995.03x = 1,491.67 × 378.57
  4. Step 4: Simplify right side
    995.03x = 564,701.51
  5. Step 5: Solve for x
    x = 564,701.51/995.03
  6. Step 6: Final answer
    x = 567.52

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Double scale
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1.5x scale

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.