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Finding the Fourth Proportional to 405.02, 558.77 and 230.33

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Solution

The fourth proportional to 405.02, 558.77 and 230.33 is: 317.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.02 : 558.77 = 230.33 : x
  2. Step 2: Convert to fraction form
    405.02/558.77 = 230.33/x
  3. Step 3: Cross multiply
    405.02x = 558.77 × 230.33
  4. Step 4: Simplify right side
    405.02x = 128,700.34
  5. Step 5: Solve for x
    x = 128,700.34/405.02
  6. Step 6: Final answer
    x = 317.76

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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.