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Finding the Fourth Proportional to 546.31, 753.70 and 388.89

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Solution

The fourth proportional to 546.31, 753.70 and 388.89 is: 536.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.31 : 753.70 = 388.89 : x
  2. Step 2: Convert to fraction form
    546.31/753.70 = 388.89/x
  3. Step 3: Cross multiply
    546.31x = 753.70 × 388.89
  4. Step 4: Simplify right side
    546.31x = 293,106.39
  5. Step 5: Solve for x
    x = 293,106.39/546.31
  6. Step 6: Final answer
    x = 536.52

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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.