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Finding the Fourth Proportional to 1,310.08, 1,807.93 and 712.57

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Solution

The fourth proportional to 1,310.08, 1,807.93 and 712.57 is: 983.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.08 : 1,807.93 = 712.57 : x
  2. Step 2: Convert to fraction form
    1,310.08/1,807.93 = 712.57/x
  3. Step 3: Cross multiply
    1,310.08x = 1,807.93 × 712.57
  4. Step 4: Simplify right side
    1,310.08x = 1,288,273.05
  5. Step 5: Solve for x
    x = 1,288,273.05/1,310.08
  6. Step 6: Final answer
    x = 983.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.