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Finding the Fourth Proportional to 995.84, 1,374.48 and 646.88

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Solution

The fourth proportional to 995.84, 1,374.48 and 646.88 is: 892.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.84 : 1,374.48 = 646.88 : x
  2. Step 2: Convert to fraction form
    995.84/1,374.48 = 646.88/x
  3. Step 3: Cross multiply
    995.84x = 1,374.48 × 646.88
  4. Step 4: Simplify right side
    995.84x = 889,123.62
  5. Step 5: Solve for x
    x = 889,123.62/995.84
  6. Step 6: Final answer
    x = 892.84

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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.