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Finding the Fourth Proportional to 918.09, 1,374.26 and 483.93

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Solution

The fourth proportional to 918.09, 1,374.26 and 483.93 is: 724.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.09 : 1,374.26 = 483.93 : x
  2. Step 2: Convert to fraction form
    918.09/1,374.26 = 483.93/x
  3. Step 3: Cross multiply
    918.09x = 1,374.26 × 483.93
  4. Step 4: Simplify right side
    918.09x = 665,043.22
  5. Step 5: Solve for x
    x = 665,043.22/918.09
  6. Step 6: Final answer
    x = 724.38

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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.