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Finding the Fourth Proportional to 491.79, 679.42 and 367.24

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Solution

The fourth proportional to 491.79, 679.42 and 367.24 is: 507.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.79 : 679.42 = 367.24 : x
  2. Step 2: Convert to fraction form
    491.79/679.42 = 367.24/x
  3. Step 3: Cross multiply
    491.79x = 679.42 × 367.24
  4. Step 4: Simplify right side
    491.79x = 249,507.29
  5. Step 5: Solve for x
    x = 249,507.29/491.79
  6. Step 6: Final answer
    x = 507.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.