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Finding the Fourth Proportional to 1,009.87, 1,514.41 and 393.49

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Solution

The fourth proportional to 1,009.87, 1,514.41 and 393.49 is: 590.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.87 : 1,514.41 = 393.49 : x
  2. Step 2: Convert to fraction form
    1,009.87/1,514.41 = 393.49/x
  3. Step 3: Cross multiply
    1,009.87x = 1,514.41 × 393.49
  4. Step 4: Simplify right side
    1,009.87x = 595,905.19
  5. Step 5: Solve for x
    x = 595,905.19/1,009.87
  6. Step 6: Final answer
    x = 590.08

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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.