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Finding the Fourth Proportional to 617.41, 925.65 and 421.93

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Solution

The fourth proportional to 617.41, 925.65 and 421.93 is: 632.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.41 : 925.65 = 421.93 : x
  2. Step 2: Convert to fraction form
    617.41/925.65 = 421.93/x
  3. Step 3: Cross multiply
    617.41x = 925.65 × 421.93
  4. Step 4: Simplify right side
    617.41x = 390,559.50
  5. Step 5: Solve for x
    x = 390,559.50/617.41
  6. Step 6: Final answer
    x = 632.58

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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.