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Finding the Fourth Proportional to 623.42, 860.28 and 357.91

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Solution

The fourth proportional to 623.42, 860.28 and 357.91 is: 493.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.42 : 860.28 = 357.91 : x
  2. Step 2: Convert to fraction form
    623.42/860.28 = 357.91/x
  3. Step 3: Cross multiply
    623.42x = 860.28 × 357.91
  4. Step 4: Simplify right side
    623.42x = 307,902.81
  5. Step 5: Solve for x
    x = 307,902.81/623.42
  6. Step 6: Final answer
    x = 493.89

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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.