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Finding the Fourth Proportional to 995.19, 1,373.30 and 553.11

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Solution

The fourth proportional to 995.19, 1,373.30 and 553.11 is: 763.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.19 : 1,373.30 = 553.11 : x
  2. Step 2: Convert to fraction form
    995.19/1,373.30 = 553.11/x
  3. Step 3: Cross multiply
    995.19x = 1,373.30 × 553.11
  4. Step 4: Simplify right side
    995.19x = 759,590.96
  5. Step 5: Solve for x
    x = 759,590.96/995.19
  6. Step 6: Final answer
    x = 763.27

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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.