Home / 1,247.19-1,870.77-515.96

Finding the Fourth Proportional to 1,247.19, 1,870.77 and 515.96

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Solution

The fourth proportional to 1,247.19, 1,870.77 and 515.96 is: 773.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.19 : 1,870.77 = 515.96 : x
  2. Step 2: Convert to fraction form
    1,247.19/1,870.77 = 515.96/x
  3. Step 3: Cross multiply
    1,247.19x = 1,870.77 × 515.96
  4. Step 4: Simplify right side
    1,247.19x = 965,242.49
  5. Step 5: Solve for x
    x = 965,242.49/1,247.19
  6. Step 6: Final answer
    x = 773.93

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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.