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Finding the Fourth Proportional to 1,299.36, 1,948.98 and 477.57

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Solution

The fourth proportional to 1,299.36, 1,948.98 and 477.57 is: 716.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.36 : 1,948.98 = 477.57 : x
  2. Step 2: Convert to fraction form
    1,299.36/1,948.98 = 477.57/x
  3. Step 3: Cross multiply
    1,299.36x = 1,948.98 × 477.57
  4. Step 4: Simplify right side
    1,299.36x = 930,782.14
  5. Step 5: Solve for x
    x = 930,782.14/1,299.36
  6. Step 6: Final answer
    x = 716.34

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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.