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Finding the Fourth Proportional to 984.47, 1,358.57 and 536.34

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Solution

The fourth proportional to 984.47, 1,358.57 and 536.34 is: 740.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.47 : 1,358.57 = 536.34 : x
  2. Step 2: Convert to fraction form
    984.47/1,358.57 = 536.34/x
  3. Step 3: Cross multiply
    984.47x = 1,358.57 × 536.34
  4. Step 4: Simplify right side
    984.47x = 728,647.39
  5. Step 5: Solve for x
    x = 728,647.39/984.47
  6. Step 6: Final answer
    x = 740.14

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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.