Home / 1,384.21-1,918.45-1,358.29

Finding the Fourth Proportional to 1,384.21, 1,918.45 and 1,358.29

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Solution

The fourth proportional to 1,384.21, 1,918.45 and 1,358.29 is: 1,882.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.21 : 1,918.45 = 1,358.29 : x
  2. Step 2: Convert to fraction form
    1,384.21/1,918.45 = 1,358.29/x
  3. Step 3: Cross multiply
    1,384.21x = 1,918.45 × 1,358.29
  4. Step 4: Simplify right side
    1,384.21x = 2,605,795.07
  5. Step 5: Solve for x
    x = 2,605,795.07/1,384.21
  6. Step 6: Final answer
    x = 1,882.52

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.