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Finding the Fourth Proportional to 995.77, 1,374.74 and 665.29

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Solution

The fourth proportional to 995.77, 1,374.74 and 665.29 is: 918.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.77 : 1,374.74 = 665.29 : x
  2. Step 2: Convert to fraction form
    995.77/1,374.74 = 665.29/x
  3. Step 3: Cross multiply
    995.77x = 1,374.74 × 665.29
  4. Step 4: Simplify right side
    995.77x = 914,600.77
  5. Step 5: Solve for x
    x = 914,600.77/995.77
  6. Step 6: Final answer
    x = 918.49

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Double scale
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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.