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Finding the Fourth Proportional to 405.29, 607.94 and 283.79

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Solution

The fourth proportional to 405.29, 607.94 and 283.79 is: 425.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.29 : 607.94 = 283.79 : x
  2. Step 2: Convert to fraction form
    405.29/607.94 = 283.79/x
  3. Step 3: Cross multiply
    405.29x = 607.94 × 283.79
  4. Step 4: Simplify right side
    405.29x = 172,527.29
  5. Step 5: Solve for x
    x = 172,527.29/405.29
  6. Step 6: Final answer
    x = 425.69

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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.