Home / 2,478.25-3,717.47-918.66

Finding the Fourth Proportional to 2,478.25, 3,717.47 and 918.66

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Solution

The fourth proportional to 2,478.25, 3,717.47 and 918.66 is: 1,378.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.25 : 3,717.47 = 918.66 : x
  2. Step 2: Convert to fraction form
    2,478.25/3,717.47 = 918.66/x
  3. Step 3: Cross multiply
    2,478.25x = 3,717.47 × 918.66
  4. Step 4: Simplify right side
    2,478.25x = 3,415,090.99
  5. Step 5: Solve for x
    x = 3,415,090.99/2,478.25
  6. Step 6: Final answer
    x = 1,378.03

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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.