Home / 1,278.69-1,918.28-585.38

Finding the Fourth Proportional to 1,278.69, 1,918.28 and 585.38

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Solution

The fourth proportional to 1,278.69, 1,918.28 and 585.38 is: 878.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.69 : 1,918.28 = 585.38 : x
  2. Step 2: Convert to fraction form
    1,278.69/1,918.28 = 585.38/x
  3. Step 3: Cross multiply
    1,278.69x = 1,918.28 × 585.38
  4. Step 4: Simplify right side
    1,278.69x = 1,122,918.22
  5. Step 5: Solve for x
    x = 1,122,918.22/1,278.69
  6. Step 6: Final answer
    x = 878.18

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1.5x scale

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.