Home / 1,528.70-2,109.08-1,331.86

Finding the Fourth Proportional to 1,528.70, 2,109.08 and 1,331.86

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Solution

The fourth proportional to 1,528.70, 2,109.08 and 1,331.86 is: 1,837.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.70 : 2,109.08 = 1,331.86 : x
  2. Step 2: Convert to fraction form
    1,528.70/2,109.08 = 1,331.86/x
  3. Step 3: Cross multiply
    1,528.70x = 2,109.08 × 1,331.86
  4. Step 4: Simplify right side
    1,528.70x = 2,808,999.29
  5. Step 5: Solve for x
    x = 2,808,999.29/1,528.70
  6. Step 6: Final answer
    x = 1,837.51

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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.