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Finding the Fourth Proportional to 1,433.97, 2,150.58 and 509.40

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Solution

The fourth proportional to 1,433.97, 2,150.58 and 509.40 is: 763.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433.97 : 2,150.58 = 509.40 : x
  2. Step 2: Convert to fraction form
    1,433.97/2,150.58 = 509.40/x
  3. Step 3: Cross multiply
    1,433.97x = 2,150.58 × 509.40
  4. Step 4: Simplify right side
    1,433.97x = 1,095,505.45
  5. Step 5: Solve for x
    x = 1,095,505.45/1,433.97
  6. Step 6: Final answer
    x = 763.97

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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.