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Finding the Fourth Proportional to 995.78, 1,374.18 and 576.15

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Solution

The fourth proportional to 995.78, 1,374.18 and 576.15 is: 795.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.78 : 1,374.18 = 576.15 : x
  2. Step 2: Convert to fraction form
    995.78/1,374.18 = 576.15/x
  3. Step 3: Cross multiply
    995.78x = 1,374.18 × 576.15
  4. Step 4: Simplify right side
    995.78x = 791,733.81
  5. Step 5: Solve for x
    x = 791,733.81/995.78
  6. Step 6: Final answer
    x = 795.09

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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.