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Finding the Fourth Proportional to 1,300.38, 1,949.64 and 715.66

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Solution

The fourth proportional to 1,300.38, 1,949.64 and 715.66 is: 1,072.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,300.38 : 1,949.64 = 715.66 : x
  2. Step 2: Convert to fraction form
    1,300.38/1,949.64 = 715.66/x
  3. Step 3: Cross multiply
    1,300.38x = 1,949.64 × 715.66
  4. Step 4: Simplify right side
    1,300.38x = 1,395,279.36
  5. Step 5: Solve for x
    x = 1,395,279.36/1,300.38
  6. Step 6: Final answer
    x = 1,072.98

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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.