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Finding the Fourth Proportional to 402.64, 602.78 and 305.52

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Solution

The fourth proportional to 402.64, 602.78 and 305.52 is: 457.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.64 : 602.78 = 305.52 : x
  2. Step 2: Convert to fraction form
    402.64/602.78 = 305.52/x
  3. Step 3: Cross multiply
    402.64x = 602.78 × 305.52
  4. Step 4: Simplify right side
    402.64x = 184,159.37
  5. Step 5: Solve for x
    x = 184,159.37/402.64
  6. Step 6: Final answer
    x = 457.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.