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Finding the Fourth Proportional to 430.21, 593.13 and 312.09

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Solution

The fourth proportional to 430.21, 593.13 and 312.09 is: 430.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.21 : 593.13 = 312.09 : x
  2. Step 2: Convert to fraction form
    430.21/593.13 = 312.09/x
  3. Step 3: Cross multiply
    430.21x = 593.13 × 312.09
  4. Step 4: Simplify right side
    430.21x = 185,109.94
  5. Step 5: Solve for x
    x = 185,109.94/430.21
  6. Step 6: Final answer
    x = 430.28

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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.