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Finding the Fourth Proportional to 546.40, 754.08 and 313.60

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Solution

The fourth proportional to 546.40, 754.08 and 313.60 is: 432.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.40 : 754.08 = 313.60 : x
  2. Step 2: Convert to fraction form
    546.40/754.08 = 313.60/x
  3. Step 3: Cross multiply
    546.40x = 754.08 × 313.60
  4. Step 4: Simplify right side
    546.40x = 236,479.49
  5. Step 5: Solve for x
    x = 236,479.49/546.40
  6. Step 6: Final answer
    x = 432.80

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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.