Home / 1,240.09-1,860.33-509.70

Finding the Fourth Proportional to 1,240.09, 1,860.33 and 509.70

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Solution

The fourth proportional to 1,240.09, 1,860.33 and 509.70 is: 764.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.09 : 1,860.33 = 509.70 : x
  2. Step 2: Convert to fraction form
    1,240.09/1,860.33 = 509.70/x
  3. Step 3: Cross multiply
    1,240.09x = 1,860.33 × 509.70
  4. Step 4: Simplify right side
    1,240.09x = 948,219.09
  5. Step 5: Solve for x
    x = 948,219.09/1,240.09
  6. Step 6: Final answer
    x = 764.64

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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.