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Finding the Fourth Proportional to 439.96, 607.28 and 284.68

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Solution

The fourth proportional to 439.96, 607.28 and 284.68 is: 392.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.96 : 607.28 = 284.68 : x
  2. Step 2: Convert to fraction form
    439.96/607.28 = 284.68/x
  3. Step 3: Cross multiply
    439.96x = 607.28 × 284.68
  4. Step 4: Simplify right side
    439.96x = 172,880.47
  5. Step 5: Solve for x
    x = 172,880.47/439.96
  6. Step 6: Final answer
    x = 392.95

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