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Finding the Fourth Proportional to 390.42, 584.28 and 292.32

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Solution

The fourth proportional to 390.42, 584.28 and 292.32 is: 437.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.42 : 584.28 = 292.32 : x
  2. Step 2: Convert to fraction form
    390.42/584.28 = 292.32/x
  3. Step 3: Cross multiply
    390.42x = 584.28 × 292.32
  4. Step 4: Simplify right side
    390.42x = 170,796.73
  5. Step 5: Solve for x
    x = 170,796.73/390.42
  6. Step 6: Final answer
    x = 437.47

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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.