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Finding the Fourth Proportional to 451.56, 619.70 and 439.95

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Solution

The fourth proportional to 451.56, 619.70 and 439.95 is: 603.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.56 : 619.70 = 439.95 : x
  2. Step 2: Convert to fraction form
    451.56/619.70 = 439.95/x
  3. Step 3: Cross multiply
    451.56x = 619.70 × 439.95
  4. Step 4: Simplify right side
    451.56x = 272,637.02
  5. Step 5: Solve for x
    x = 272,637.02/451.56
  6. Step 6: Final answer
    x = 603.77

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.