Home / 1,245.18-1,868.60-514.74

Finding the Fourth Proportional to 1,245.18, 1,868.60 and 514.74

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Solution

The fourth proportional to 1,245.18, 1,868.60 and 514.74 is: 772.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.18 : 1,868.60 = 514.74 : x
  2. Step 2: Convert to fraction form
    1,245.18/1,868.60 = 514.74/x
  3. Step 3: Cross multiply
    1,245.18x = 1,868.60 × 514.74
  4. Step 4: Simplify right side
    1,245.18x = 961,843.16
  5. Step 5: Solve for x
    x = 961,843.16/1,245.18
  6. Step 6: Final answer
    x = 772.45

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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.