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Finding the Fourth Proportional to 508.74, 701.54 and 439.02

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Solution

The fourth proportional to 508.74, 701.54 and 439.02 is: 605.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.74 : 701.54 = 439.02 : x
  2. Step 2: Convert to fraction form
    508.74/701.54 = 439.02/x
  3. Step 3: Cross multiply
    508.74x = 701.54 × 439.02
  4. Step 4: Simplify right side
    508.74x = 307,990.09
  5. Step 5: Solve for x
    x = 307,990.09/508.74
  6. Step 6: Final answer
    x = 605.40

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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.