Home / 1,338.15-1,847.07-918.33

Finding the Fourth Proportional to 1,338.15, 1,847.07 and 918.33

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Solution

The fourth proportional to 1,338.15, 1,847.07 and 918.33 is: 1,267.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.15 : 1,847.07 = 918.33 : x
  2. Step 2: Convert to fraction form
    1,338.15/1,847.07 = 918.33/x
  3. Step 3: Cross multiply
    1,338.15x = 1,847.07 × 918.33
  4. Step 4: Simplify right side
    1,338.15x = 1,696,219.79
  5. Step 5: Solve for x
    x = 1,696,219.79/1,338.15
  6. Step 6: Final answer
    x = 1,267.59

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1.5x scale

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.