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Finding the Fourth Proportional to 347.51, 479.36 and 312.27

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Solution

The fourth proportional to 347.51, 479.36 and 312.27 is: 430.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.51 : 479.36 = 312.27 : x
  2. Step 2: Convert to fraction form
    347.51/479.36 = 312.27/x
  3. Step 3: Cross multiply
    347.51x = 479.36 × 312.27
  4. Step 4: Simplify right side
    347.51x = 149,690.53
  5. Step 5: Solve for x
    x = 149,690.53/347.51
  6. Step 6: Final answer
    x = 430.76

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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.