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Finding the Fourth Proportional to 911.70, 1,364.85 and 603.90

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Solution

The fourth proportional to 911.70, 1,364.85 and 603.90 is: 904.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    911.70 : 1,364.85 = 603.90 : x
  2. Step 2: Convert to fraction form
    911.70/1,364.85 = 603.90/x
  3. Step 3: Cross multiply
    911.70x = 1,364.85 × 603.90
  4. Step 4: Simplify right side
    911.70x = 824,232.92
  5. Step 5: Solve for x
    x = 824,232.92/911.70
  6. Step 6: Final answer
    x = 904.06

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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.