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Finding the Fourth Proportional to 475.52, 656.52 and 388.40

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Solution

The fourth proportional to 475.52, 656.52 and 388.40 is: 536.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.52 : 656.52 = 388.40 : x
  2. Step 2: Convert to fraction form
    475.52/656.52 = 388.40/x
  3. Step 3: Cross multiply
    475.52x = 656.52 × 388.40
  4. Step 4: Simplify right side
    475.52x = 254,992.37
  5. Step 5: Solve for x
    x = 254,992.37/475.52
  6. Step 6: Final answer
    x = 536.24

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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.