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Finding the Fourth Proportional to 983.97, 1,357.62 and 585.74

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Solution

The fourth proportional to 983.97, 1,357.62 and 585.74 is: 808.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.97 : 1,357.62 = 585.74 : x
  2. Step 2: Convert to fraction form
    983.97/1,357.62 = 585.74/x
  3. Step 3: Cross multiply
    983.97x = 1,357.62 × 585.74
  4. Step 4: Simplify right side
    983.97x = 795,205.55
  5. Step 5: Solve for x
    x = 795,205.55/983.97
  6. Step 6: Final answer
    x = 808.16

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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.