Home / 1,488.21-2,230.65-756.28

Finding the Fourth Proportional to 1,488.21, 2,230.65 and 756.28

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Solution

The fourth proportional to 1,488.21, 2,230.65 and 756.28 is: 1,133.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.21 : 2,230.65 = 756.28 : x
  2. Step 2: Convert to fraction form
    1,488.21/2,230.65 = 756.28/x
  3. Step 3: Cross multiply
    1,488.21x = 2,230.65 × 756.28
  4. Step 4: Simplify right side
    1,488.21x = 1,686,995.98
  5. Step 5: Solve for x
    x = 1,686,995.98/1,488.21
  6. Step 6: Final answer
    x = 1,133.57

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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.