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Finding the Fourth Proportional to 984.34, 1,358.54 and 586.03

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Solution

The fourth proportional to 984.34, 1,358.54 and 586.03 is: 808.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.34 : 1,358.54 = 586.03 : x
  2. Step 2: Convert to fraction form
    984.34/1,358.54 = 586.03/x
  3. Step 3: Cross multiply
    984.34x = 1,358.54 × 586.03
  4. Step 4: Simplify right side
    984.34x = 796,135.47
  5. Step 5: Solve for x
    x = 796,135.47/984.34
  6. Step 6: Final answer
    x = 808.80

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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.