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Finding the Fourth Proportional to 1,866.91, 2,801.16 and 712.39

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Solution

The fourth proportional to 1,866.91, 2,801.16 and 712.39 is: 1,068.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,866.91 : 2,801.16 = 712.39 : x
  2. Step 2: Convert to fraction form
    1,866.91/2,801.16 = 712.39/x
  3. Step 3: Cross multiply
    1,866.91x = 2,801.16 × 712.39
  4. Step 4: Simplify right side
    1,866.91x = 1,995,518.37
  5. Step 5: Solve for x
    x = 1,995,518.37/1,866.91
  6. Step 6: Final answer
    x = 1,068.89

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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.