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Finding the Fourth Proportional to 1,429.60, 2,144.64 and 505.28

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Solution

The fourth proportional to 1,429.60, 2,144.64 and 505.28 is: 758.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.60 : 2,144.64 = 505.28 : x
  2. Step 2: Convert to fraction form
    1,429.60/2,144.64 = 505.28/x
  3. Step 3: Cross multiply
    1,429.60x = 2,144.64 × 505.28
  4. Step 4: Simplify right side
    1,429.60x = 1,083,643.70
  5. Step 5: Solve for x
    x = 1,083,643.70/1,429.60
  6. Step 6: Final answer
    x = 758.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.