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Finding the Fourth Proportional to 430.45, 593.64 and 356.64

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Solution

The fourth proportional to 430.45, 593.64 and 356.64 is: 491.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.45 : 593.64 = 356.64 : x
  2. Step 2: Convert to fraction form
    430.45/593.64 = 356.64/x
  3. Step 3: Cross multiply
    430.45x = 593.64 × 356.64
  4. Step 4: Simplify right side
    430.45x = 211,715.77
  5. Step 5: Solve for x
    x = 211,715.77/430.45
  6. Step 6: Final answer
    x = 491.85

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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.