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Finding the Fourth Proportional to 346.74, 475.86 and 313.92

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Solution

The fourth proportional to 346.74, 475.86 and 313.92 is: 430.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.74 : 475.86 = 313.92 : x
  2. Step 2: Convert to fraction form
    346.74/475.86 = 313.92/x
  3. Step 3: Cross multiply
    346.74x = 475.86 × 313.92
  4. Step 4: Simplify right side
    346.74x = 149,381.97
  5. Step 5: Solve for x
    x = 149,381.97/346.74
  6. Step 6: Final answer
    x = 430.82

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.