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Finding the Fourth Proportional to 440.22, 607.78 and 307.38

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Solution

The fourth proportional to 440.22, 607.78 and 307.38 is: 424.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.22 : 607.78 = 307.38 : x
  2. Step 2: Convert to fraction form
    440.22/607.78 = 307.38/x
  3. Step 3: Cross multiply
    440.22x = 607.78 × 307.38
  4. Step 4: Simplify right side
    440.22x = 186,819.42
  5. Step 5: Solve for x
    x = 186,819.42/440.22
  6. Step 6: Final answer
    x = 424.38

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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.