Home / 1,157.28-1,736.09-387.60

Finding the Fourth Proportional to 1,157.28, 1,736.09 and 387.60

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Solution

The fourth proportional to 1,157.28, 1,736.09 and 387.60 is: 581.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.28 : 1,736.09 = 387.60 : x
  2. Step 2: Convert to fraction form
    1,157.28/1,736.09 = 387.60/x
  3. Step 3: Cross multiply
    1,157.28x = 1,736.09 × 387.60
  4. Step 4: Simplify right side
    1,157.28x = 672,899.80
  5. Step 5: Solve for x
    x = 672,899.80/1,157.28
  6. Step 6: Final answer
    x = 581.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.