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Finding the Fourth Proportional to 795.15, 1,097.28 and 618.30

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Solution

The fourth proportional to 795.15, 1,097.28 and 618.30 is: 853.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.15 : 1,097.28 = 618.30 : x
  2. Step 2: Convert to fraction form
    795.15/1,097.28 = 618.30/x
  3. Step 3: Cross multiply
    795.15x = 1,097.28 × 618.30
  4. Step 4: Simplify right side
    795.15x = 678,448.22
  5. Step 5: Solve for x
    x = 678,448.22/795.15
  6. Step 6: Final answer
    x = 853.23

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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.