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Finding the Fourth Proportional to 440.40, 606.48 and 357.36

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Solution

The fourth proportional to 440.40, 606.48 and 357.36 is: 492.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.40 : 606.48 = 357.36 : x
  2. Step 2: Convert to fraction form
    440.40/606.48 = 357.36/x
  3. Step 3: Cross multiply
    440.40x = 606.48 × 357.36
  4. Step 4: Simplify right side
    440.40x = 216,731.69
  5. Step 5: Solve for x
    x = 216,731.69/440.40
  6. Step 6: Final answer
    x = 492.12

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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.