Home / 1,412.33-2,118.13-631.89

Finding the Fourth Proportional to 1,412.33, 2,118.13 and 631.89

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Solution

The fourth proportional to 1,412.33, 2,118.13 and 631.89 is: 947.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.33 : 2,118.13 = 631.89 : x
  2. Step 2: Convert to fraction form
    1,412.33/2,118.13 = 631.89/x
  3. Step 3: Cross multiply
    1,412.33x = 2,118.13 × 631.89
  4. Step 4: Simplify right side
    1,412.33x = 1,338,425.17
  5. Step 5: Solve for x
    x = 1,338,425.17/1,412.33
  6. Step 6: Final answer
    x = 947.68

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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.