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Finding the Fourth Proportional to 328.96, 454.16 and 307.20

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Solution

The fourth proportional to 328.96, 454.16 and 307.20 is: 424.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.96 : 454.16 = 307.20 : x
  2. Step 2: Convert to fraction form
    328.96/454.16 = 307.20/x
  3. Step 3: Cross multiply
    328.96x = 454.16 × 307.20
  4. Step 4: Simplify right side
    328.96x = 139,517.95
  5. Step 5: Solve for x
    x = 139,517.95/328.96
  6. Step 6: Final answer
    x = 424.12

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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.