Home / 1,708.40-2,362.20-1,489.70

Finding the Fourth Proportional to 1,708.40, 2,362.20 and 1,489.70

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Solution

The fourth proportional to 1,708.40, 2,362.20 and 1,489.70 is: 2,059.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,708.40 : 2,362.20 = 1,489.70 : x
  2. Step 2: Convert to fraction form
    1,708.40/2,362.20 = 1,489.70/x
  3. Step 3: Cross multiply
    1,708.40x = 2,362.20 × 1,489.70
  4. Step 4: Simplify right side
    1,708.40x = 3,518,969.34
  5. Step 5: Solve for x
    x = 3,518,969.34/1,708.40
  6. Step 6: Final answer
    x = 2,059.80

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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.