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Finding the Fourth Proportional to 1,283.07, 1,923.85 and 579.99

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Solution

The fourth proportional to 1,283.07, 1,923.85 and 579.99 is: 869.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.07 : 1,923.85 = 579.99 : x
  2. Step 2: Convert to fraction form
    1,283.07/1,923.85 = 579.99/x
  3. Step 3: Cross multiply
    1,283.07x = 1,923.85 × 579.99
  4. Step 4: Simplify right side
    1,283.07x = 1,115,821.70
  5. Step 5: Solve for x
    x = 1,115,821.70/1,283.07
  6. Step 6: Final answer
    x = 869.65

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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.