Home / 1,528.61-2,109.49-899.15

Finding the Fourth Proportional to 1,528.61, 2,109.49 and 899.15

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Solution

The fourth proportional to 1,528.61, 2,109.49 and 899.15 is: 1,240.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.61 : 2,109.49 = 899.15 : x
  2. Step 2: Convert to fraction form
    1,528.61/2,109.49 = 899.15/x
  3. Step 3: Cross multiply
    1,528.61x = 2,109.49 × 899.15
  4. Step 4: Simplify right side
    1,528.61x = 1,896,735.14
  5. Step 5: Solve for x
    x = 1,896,735.14/1,528.61
  6. Step 6: Final answer
    x = 1,240.83

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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.