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Finding the Fourth Proportional to 995.52, 1,373.94 and 646.08

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Solution

The fourth proportional to 995.52, 1,373.94 and 646.08 is: 891.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.52 : 1,373.94 = 646.08 : x
  2. Step 2: Convert to fraction form
    995.52/1,373.94 = 646.08/x
  3. Step 3: Cross multiply
    995.52x = 1,373.94 × 646.08
  4. Step 4: Simplify right side
    995.52x = 887,675.16
  5. Step 5: Solve for x
    x = 887,675.16/995.52
  6. Step 6: Final answer
    x = 891.67

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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.