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Finding the Fourth Proportional to 479.79, 720.07 and 248.74

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Solution

The fourth proportional to 479.79, 720.07 and 248.74 is: 373.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.79 : 720.07 = 248.74 : x
  2. Step 2: Convert to fraction form
    479.79/720.07 = 248.74/x
  3. Step 3: Cross multiply
    479.79x = 720.07 × 248.74
  4. Step 4: Simplify right side
    479.79x = 179,111.49
  5. Step 5: Solve for x
    x = 179,111.49/479.79
  6. Step 6: Final answer
    x = 373.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.