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Finding the Fourth Proportional to 313.31, 432.07 and 283.88

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Solution

The fourth proportional to 313.31, 432.07 and 283.88 is: 391.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.31 : 432.07 = 283.88 : x
  2. Step 2: Convert to fraction form
    313.31/432.07 = 283.88/x
  3. Step 3: Cross multiply
    313.31x = 432.07 × 283.88
  4. Step 4: Simplify right side
    313.31x = 122,656.40
  5. Step 5: Solve for x
    x = 122,656.40/313.31
  6. Step 6: Final answer
    x = 391.48

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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.