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Finding the Fourth Proportional to 1,412.83, 2,118.88 and 632.39

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Solution

The fourth proportional to 1,412.83, 2,118.88 and 632.39 is: 948.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.83 : 2,118.88 = 632.39 : x
  2. Step 2: Convert to fraction form
    1,412.83/2,118.88 = 632.39/x
  3. Step 3: Cross multiply
    1,412.83x = 2,118.88 × 632.39
  4. Step 4: Simplify right side
    1,412.83x = 1,339,958.52
  5. Step 5: Solve for x
    x = 1,339,958.52/1,412.83
  6. Step 6: Final answer
    x = 948.42

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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.