Home / 1,528.48-2,109.38-899.04

Finding the Fourth Proportional to 1,528.48, 2,109.38 and 899.04

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Solution

The fourth proportional to 1,528.48, 2,109.38 and 899.04 is: 1,240.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.48 : 2,109.38 = 899.04 : x
  2. Step 2: Convert to fraction form
    1,528.48/2,109.38 = 899.04/x
  3. Step 3: Cross multiply
    1,528.48x = 2,109.38 × 899.04
  4. Step 4: Simplify right side
    1,528.48x = 1,896,417.00
  5. Step 5: Solve for x
    x = 1,896,417.00/1,528.48
  6. Step 6: Final answer
    x = 1,240.72

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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.