Home / 1,690.59-2,330.89-1,292.74

Finding the Fourth Proportional to 1,690.59, 2,330.89 and 1,292.74

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Solution

The fourth proportional to 1,690.59, 2,330.89 and 1,292.74 is: 1,782.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.59 : 2,330.89 = 1,292.74 : x
  2. Step 2: Convert to fraction form
    1,690.59/2,330.89 = 1,292.74/x
  3. Step 3: Cross multiply
    1,690.59x = 2,330.89 × 1,292.74
  4. Step 4: Simplify right side
    1,690.59x = 3,013,234.74
  5. Step 5: Solve for x
    x = 3,013,234.74/1,690.59
  6. Step 6: Final answer
    x = 1,782.36

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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.