Home / 1,645.28-2,270.40-899.24

Finding the Fourth Proportional to 1,645.28, 2,270.40 and 899.24

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Solution

The fourth proportional to 1,645.28, 2,270.40 and 899.24 is: 1,240.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.28 : 2,270.40 = 899.24 : x
  2. Step 2: Convert to fraction form
    1,645.28/2,270.40 = 899.24/x
  3. Step 3: Cross multiply
    1,645.28x = 2,270.40 × 899.24
  4. Step 4: Simplify right side
    1,645.28x = 2,041,619.77
  5. Step 5: Solve for x
    x = 2,041,619.77/1,645.28
  6. Step 6: Final answer
    x = 1,240.90

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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.