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Finding the Fourth Proportional to 594.31, 891.64 and 421.31

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Solution

The fourth proportional to 594.31, 891.64 and 421.31 is: 632.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    594.31 : 891.64 = 421.31 : x
  2. Step 2: Convert to fraction form
    594.31/891.64 = 421.31/x
  3. Step 3: Cross multiply
    594.31x = 891.64 × 421.31
  4. Step 4: Simplify right side
    594.31x = 375,656.26
  5. Step 5: Solve for x
    x = 375,656.26/594.31
  6. Step 6: Final answer
    x = 632.09

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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.