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Finding the Fourth Proportional to 983.70, 1,356.75 and 673.02

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Solution

The fourth proportional to 983.70, 1,356.75 and 673.02 is: 928.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.70 : 1,356.75 = 673.02 : x
  2. Step 2: Convert to fraction form
    983.70/1,356.75 = 673.02/x
  3. Step 3: Cross multiply
    983.70x = 1,356.75 × 673.02
  4. Step 4: Simplify right side
    983.70x = 913,119.89
  5. Step 5: Solve for x
    x = 913,119.89/983.70
  6. Step 6: Final answer
    x = 928.25

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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.