Home / 1,678.58-2,317.08-1,089.17

Finding the Fourth Proportional to 1,678.58, 2,317.08 and 1,089.17

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Solution

The fourth proportional to 1,678.58, 2,317.08 and 1,089.17 is: 1,503.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.58 : 2,317.08 = 1,089.17 : x
  2. Step 2: Convert to fraction form
    1,678.58/2,317.08 = 1,089.17/x
  3. Step 3: Cross multiply
    1,678.58x = 2,317.08 × 1,089.17
  4. Step 4: Simplify right side
    1,678.58x = 2,523,694.02
  5. Step 5: Solve for x
    x = 2,523,694.02/1,678.58
  6. Step 6: Final answer
    x = 1,503.47

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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.