Home / 1,553.32-2,145.54-1,089.64

Finding the Fourth Proportional to 1,553.32, 2,145.54 and 1,089.64

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Solution

The fourth proportional to 1,553.32, 2,145.54 and 1,089.64 is: 1,505.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.32 : 2,145.54 = 1,089.64 : x
  2. Step 2: Convert to fraction form
    1,553.32/2,145.54 = 1,089.64/x
  3. Step 3: Cross multiply
    1,553.32x = 2,145.54 × 1,089.64
  4. Step 4: Simplify right side
    1,553.32x = 2,337,866.21
  5. Step 5: Solve for x
    x = 2,337,866.21/1,553.32
  6. Step 6: Final answer
    x = 1,505.08

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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.