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Finding the Fourth Proportional to 1,421.82, 2,132.01 and 555.66

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Solution

The fourth proportional to 1,421.82, 2,132.01 and 555.66 is: 833.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.82 : 2,132.01 = 555.66 : x
  2. Step 2: Convert to fraction form
    1,421.82/2,132.01 = 555.66/x
  3. Step 3: Cross multiply
    1,421.82x = 2,132.01 × 555.66
  4. Step 4: Simplify right side
    1,421.82x = 1,184,672.68
  5. Step 5: Solve for x
    x = 1,184,672.68/1,421.82
  6. Step 6: Final answer
    x = 833.21

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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.