Home / 1,430.38-2,135.57-1,266.76

Finding the Fourth Proportional to 1,430.38, 2,135.57 and 1,266.76

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Solution

The fourth proportional to 1,430.38, 2,135.57 and 1,266.76 is: 1,891.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.38 : 2,135.57 = 1,266.76 : x
  2. Step 2: Convert to fraction form
    1,430.38/2,135.57 = 1,266.76/x
  3. Step 3: Cross multiply
    1,430.38x = 2,135.57 × 1,266.76
  4. Step 4: Simplify right side
    1,430.38x = 2,705,254.65
  5. Step 5: Solve for x
    x = 2,705,254.65/1,430.38
  6. Step 6: Final answer
    x = 1,891.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.