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Finding the Fourth Proportional to 357.57, 493.68 and 320.16

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Solution

The fourth proportional to 357.57, 493.68 and 320.16 is: 442.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.57 : 493.68 = 320.16 : x
  2. Step 2: Convert to fraction form
    357.57/493.68 = 320.16/x
  3. Step 3: Cross multiply
    357.57x = 493.68 × 320.16
  4. Step 4: Simplify right side
    357.57x = 158,056.59
  5. Step 5: Solve for x
    x = 158,056.59/357.57
  6. Step 6: Final answer
    x = 442.03

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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.