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Finding the Fourth Proportional to 983.96, 1,358.14 and 570.04

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Solution

The fourth proportional to 983.96, 1,358.14 and 570.04 is: 786.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.96 : 1,358.14 = 570.04 : x
  2. Step 2: Convert to fraction form
    983.96/1,358.14 = 570.04/x
  3. Step 3: Cross multiply
    983.96x = 1,358.14 × 570.04
  4. Step 4: Simplify right side
    983.96x = 774,194.13
  5. Step 5: Solve for x
    x = 774,194.13/983.96
  6. Step 6: Final answer
    x = 786.81

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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.