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Finding the Fourth Proportional to 457.58, 685.45 and 348.08

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Solution

The fourth proportional to 457.58, 685.45 and 348.08 is: 521.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.58 : 685.45 = 348.08 : x
  2. Step 2: Convert to fraction form
    457.58/685.45 = 348.08/x
  3. Step 3: Cross multiply
    457.58x = 685.45 × 348.08
  4. Step 4: Simplify right side
    457.58x = 238,588.01
  5. Step 5: Solve for x
    x = 238,588.01/457.58
  6. Step 6: Final answer
    x = 521.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.