Home / 1,275.40-1,758.42-1,097.98

Finding the Fourth Proportional to 1,275.40, 1,758.42 and 1,097.98

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Solution

The fourth proportional to 1,275.40, 1,758.42 and 1,097.98 is: 1,513.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.40 : 1,758.42 = 1,097.98 : x
  2. Step 2: Convert to fraction form
    1,275.40/1,758.42 = 1,097.98/x
  3. Step 3: Cross multiply
    1,275.40x = 1,758.42 × 1,097.98
  4. Step 4: Simplify right side
    1,275.40x = 1,930,709.99
  5. Step 5: Solve for x
    x = 1,930,709.99/1,275.40
  6. Step 6: Final answer
    x = 1,513.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.