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Finding the Fourth Proportional to 393.51, 590.31 and 292.08

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Solution

The fourth proportional to 393.51, 590.31 and 292.08 is: 438.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.51 : 590.31 = 292.08 : x
  2. Step 2: Convert to fraction form
    393.51/590.31 = 292.08/x
  3. Step 3: Cross multiply
    393.51x = 590.31 × 292.08
  4. Step 4: Simplify right side
    393.51x = 172,417.74
  5. Step 5: Solve for x
    x = 172,417.74/393.51
  6. Step 6: Final answer
    x = 438.15

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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.