Home / 1,678.62-2,317.58-1,081.38

Finding the Fourth Proportional to 1,678.62, 2,317.58 and 1,081.38

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Solution

The fourth proportional to 1,678.62, 2,317.58 and 1,081.38 is: 1,493.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.62 : 2,317.58 = 1,081.38 : x
  2. Step 2: Convert to fraction form
    1,678.62/2,317.58 = 1,081.38/x
  3. Step 3: Cross multiply
    1,678.62x = 2,317.58 × 1,081.38
  4. Step 4: Simplify right side
    1,678.62x = 2,506,184.66
  5. Step 5: Solve for x
    x = 2,506,184.66/1,678.62
  6. Step 6: Final answer
    x = 1,493.00

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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.