Home / 1,698.18-2,545.20-1,390.68

Finding the Fourth Proportional to 1,698.18, 2,545.20 and 1,390.68

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Solution

The fourth proportional to 1,698.18, 2,545.20 and 1,390.68 is: 2,084.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.18 : 2,545.20 = 1,390.68 : x
  2. Step 2: Convert to fraction form
    1,698.18/2,545.20 = 1,390.68/x
  3. Step 3: Cross multiply
    1,698.18x = 2,545.20 × 1,390.68
  4. Step 4: Simplify right side
    1,698.18x = 3,539,558.74
  5. Step 5: Solve for x
    x = 3,539,558.74/1,698.18
  6. Step 6: Final answer
    x = 2,084.32

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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.