Home / 1,688.09-2,314.67-1,521.63

Finding the Fourth Proportional to 1,688.09, 2,314.67 and 1,521.63

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Solution

The fourth proportional to 1,688.09, 2,314.67 and 1,521.63 is: 2,086.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.09 : 2,314.67 = 1,521.63 : x
  2. Step 2: Convert to fraction form
    1,688.09/2,314.67 = 1,521.63/x
  3. Step 3: Cross multiply
    1,688.09x = 2,314.67 × 1,521.63
  4. Step 4: Simplify right side
    1,688.09x = 3,522,063.70
  5. Step 5: Solve for x
    x = 3,522,063.70/1,688.09
  6. Step 6: Final answer
    x = 2,086.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.