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Finding the Fourth Proportional to 918.21, 1,267.53 and 603.48

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Solution

The fourth proportional to 918.21, 1,267.53 and 603.48 is: 833.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.21 : 1,267.53 = 603.48 : x
  2. Step 2: Convert to fraction form
    918.21/1,267.53 = 603.48/x
  3. Step 3: Cross multiply
    918.21x = 1,267.53 × 603.48
  4. Step 4: Simplify right side
    918.21x = 764,929.00
  5. Step 5: Solve for x
    x = 764,929.00/918.21
  6. Step 6: Final answer
    x = 833.07

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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.