Home / 1,416.69-2,125.58-686.21

Finding the Fourth Proportional to 1,416.69, 2,125.58 and 686.21

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Solution

The fourth proportional to 1,416.69, 2,125.58 and 686.21 is: 1,029.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.69 : 2,125.58 = 686.21 : x
  2. Step 2: Convert to fraction form
    1,416.69/2,125.58 = 686.21/x
  3. Step 3: Cross multiply
    1,416.69x = 2,125.58 × 686.21
  4. Step 4: Simplify right side
    1,416.69x = 1,458,594.25
  5. Step 5: Solve for x
    x = 1,458,594.25/1,416.69
  6. Step 6: Final answer
    x = 1,029.58

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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.