Home / 1,309.01-1,964.36-487.28

Finding the Fourth Proportional to 1,309.01, 1,964.36 and 487.28

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Solution

The fourth proportional to 1,309.01, 1,964.36 and 487.28 is: 731.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.01 : 1,964.36 = 487.28 : x
  2. Step 2: Convert to fraction form
    1,309.01/1,964.36 = 487.28/x
  3. Step 3: Cross multiply
    1,309.01x = 1,964.36 × 487.28
  4. Step 4: Simplify right side
    1,309.01x = 957,199.47
  5. Step 5: Solve for x
    x = 957,199.47/1,309.01
  6. Step 6: Final answer
    x = 731.24

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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.