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Finding the Fourth Proportional to 624.42, 860.64 and 427.62

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Solution

The fourth proportional to 624.42, 860.64 and 427.62 is: 589.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.42 : 860.64 = 427.62 : x
  2. Step 2: Convert to fraction form
    624.42/860.64 = 427.62/x
  3. Step 3: Cross multiply
    624.42x = 860.64 × 427.62
  4. Step 4: Simplify right side
    624.42x = 368,026.88
  5. Step 5: Solve for x
    x = 368,026.88/624.42
  6. Step 6: Final answer
    x = 589.39

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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.