Home / 1,428.60-1,971.90-1,036.20

Finding the Fourth Proportional to 1,428.60, 1,971.90 and 1,036.20

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Solution

The fourth proportional to 1,428.60, 1,971.90 and 1,036.20 is: 1,430.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.60 : 1,971.90 = 1,036.20 : x
  2. Step 2: Convert to fraction form
    1,428.60/1,971.90 = 1,036.20/x
  3. Step 3: Cross multiply
    1,428.60x = 1,971.90 × 1,036.20
  4. Step 4: Simplify right side
    1,428.60x = 2,043,282.78
  5. Step 5: Solve for x
    x = 2,043,282.78/1,428.60
  6. Step 6: Final answer
    x = 1,430.27

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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.