Home / 1,430.48-1,972.08-1,399.43

Finding the Fourth Proportional to 1,430.48, 1,972.08 and 1,399.43

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Solution

The fourth proportional to 1,430.48, 1,972.08 and 1,399.43 is: 1,929.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.48 : 1,972.08 = 1,399.43 : x
  2. Step 2: Convert to fraction form
    1,430.48/1,972.08 = 1,399.43/x
  3. Step 3: Cross multiply
    1,430.48x = 1,972.08 × 1,399.43
  4. Step 4: Simplify right side
    1,430.48x = 2,759,787.91
  5. Step 5: Solve for x
    x = 2,759,787.91/1,430.48
  6. Step 6: Final answer
    x = 1,929.27

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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.