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Finding the Fourth Proportional to 430.47, 593.49 and 312.62

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Solution

The fourth proportional to 430.47, 593.49 and 312.62 is: 431.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.47 : 593.49 = 312.62 : x
  2. Step 2: Convert to fraction form
    430.47/593.49 = 312.62/x
  3. Step 3: Cross multiply
    430.47x = 593.49 × 312.62
  4. Step 4: Simplify right side
    430.47x = 185,535.05
  5. Step 5: Solve for x
    x = 185,535.05/430.47
  6. Step 6: Final answer
    x = 431.01

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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.