Home / 1,553.64-2,130.89-1,378.68

Finding the Fourth Proportional to 1,553.64, 2,130.89 and 1,378.68

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Solution

The fourth proportional to 1,553.64, 2,130.89 and 1,378.68 is: 1,890.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.64 : 2,130.89 = 1,378.68 : x
  2. Step 2: Convert to fraction form
    1,553.64/2,130.89 = 1,378.68/x
  3. Step 3: Cross multiply
    1,553.64x = 2,130.89 × 1,378.68
  4. Step 4: Simplify right side
    1,553.64x = 2,937,815.43
  5. Step 5: Solve for x
    x = 2,937,815.43/1,553.64
  6. Step 6: Final answer
    x = 1,890.92

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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.