Home / 1,420.36-1,960.58-1,071.08

Finding the Fourth Proportional to 1,420.36, 1,960.58 and 1,071.08

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Solution

The fourth proportional to 1,420.36, 1,960.58 and 1,071.08 is: 1,478.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.36 : 1,960.58 = 1,071.08 : x
  2. Step 2: Convert to fraction form
    1,420.36/1,960.58 = 1,071.08/x
  3. Step 3: Cross multiply
    1,420.36x = 1,960.58 × 1,071.08
  4. Step 4: Simplify right side
    1,420.36x = 2,099,938.03
  5. Step 5: Solve for x
    x = 2,099,938.03/1,420.36
  6. Step 6: Final answer
    x = 1,478.45

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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.