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Finding the Fourth Proportional to 623.56, 860.11 and 384.20

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Solution

The fourth proportional to 623.56, 860.11 and 384.20 is: 529.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.56 : 860.11 = 384.20 : x
  2. Step 2: Convert to fraction form
    623.56/860.11 = 384.20/x
  3. Step 3: Cross multiply
    623.56x = 860.11 × 384.20
  4. Step 4: Simplify right side
    623.56x = 330,454.26
  5. Step 5: Solve for x
    x = 330,454.26/623.56
  6. Step 6: Final answer
    x = 529.95

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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.