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Finding the Fourth Proportional to 445.67, 614.40 and 384.15

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Solution

The fourth proportional to 445.67, 614.40 and 384.15 is: 529.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.67 : 614.40 = 384.15 : x
  2. Step 2: Convert to fraction form
    445.67/614.40 = 384.15/x
  3. Step 3: Cross multiply
    445.67x = 614.40 × 384.15
  4. Step 4: Simplify right side
    445.67x = 236,021.76
  5. Step 5: Solve for x
    x = 236,021.76/445.67
  6. Step 6: Final answer
    x = 529.59

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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.