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Finding the Fourth Proportional to 440.18, 607.68 and 285.02

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Solution

The fourth proportional to 440.18, 607.68 and 285.02 is: 393.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.18 : 607.68 = 285.02 : x
  2. Step 2: Convert to fraction form
    440.18/607.68 = 285.02/x
  3. Step 3: Cross multiply
    440.18x = 607.68 × 285.02
  4. Step 4: Simplify right side
    440.18x = 173,200.95
  5. Step 5: Solve for x
    x = 173,200.95/440.18
  6. Step 6: Final answer
    x = 393.48

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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.