Home / 1,678.62-2,317.57-1,081.35

Finding the Fourth Proportional to 1,678.62, 2,317.57 and 1,081.35

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Solution

The fourth proportional to 1,678.62, 2,317.57 and 1,081.35 is: 1,492.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.62 : 2,317.57 = 1,081.35 : x
  2. Step 2: Convert to fraction form
    1,678.62/2,317.57 = 1,081.35/x
  3. Step 3: Cross multiply
    1,678.62x = 2,317.57 × 1,081.35
  4. Step 4: Simplify right side
    1,678.62x = 2,506,101.62
  5. Step 5: Solve for x
    x = 2,506,101.62/1,678.62
  6. Step 6: Final answer
    x = 1,492.95

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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.