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Finding the Fourth Proportional to 911.84, 1,365.60 and 500.36

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Solution

The fourth proportional to 911.84, 1,365.60 and 500.36 is: 749.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.84 : 1,365.60 = 500.36 : x
  2. Step 2: Convert to fraction form
    911.84/1,365.60 = 500.36/x
  3. Step 3: Cross multiply
    911.84x = 1,365.60 × 500.36
  4. Step 4: Simplify right side
    911.84x = 683,291.62
  5. Step 5: Solve for x
    x = 683,291.62/911.84
  6. Step 6: Final answer
    x = 749.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.