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Finding the Fourth Proportional to 403.37, 557.03 and 388.32

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Solution

The fourth proportional to 403.37, 557.03 and 388.32 is: 536.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.37 : 557.03 = 388.32 : x
  2. Step 2: Convert to fraction form
    403.37/557.03 = 388.32/x
  3. Step 3: Cross multiply
    403.37x = 557.03 × 388.32
  4. Step 4: Simplify right side
    403.37x = 216,303.95
  5. Step 5: Solve for x
    x = 216,303.95/403.37
  6. Step 6: Final answer
    x = 536.25

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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.