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Finding the Fourth Proportional to 430.32, 593.28 and 387.12

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Solution

The fourth proportional to 430.32, 593.28 and 387.12 is: 533.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.32 : 593.28 = 387.12 : x
  2. Step 2: Convert to fraction form
    430.32/593.28 = 387.12/x
  3. Step 3: Cross multiply
    430.32x = 593.28 × 387.12
  4. Step 4: Simplify right side
    430.32x = 229,670.55
  5. Step 5: Solve for x
    x = 229,670.55/430.32
  6. Step 6: Final answer
    x = 533.72

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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.