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Finding the Fourth Proportional to 979.01, 1,351.07 and 585.95

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Solution

The fourth proportional to 979.01, 1,351.07 and 585.95 is: 808.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.01 : 1,351.07 = 585.95 : x
  2. Step 2: Convert to fraction form
    979.01/1,351.07 = 585.95/x
  3. Step 3: Cross multiply
    979.01x = 1,351.07 × 585.95
  4. Step 4: Simplify right side
    979.01x = 791,662.11
  5. Step 5: Solve for x
    x = 791,662.11/979.01
  6. Step 6: Final answer
    x = 808.64

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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.