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Finding the Fourth Proportional to 479.04, 715.23 and 423.84

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Solution

The fourth proportional to 479.04, 715.23 and 423.84 is: 632.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.04 : 715.23 = 423.84 : x
  2. Step 2: Convert to fraction form
    479.04/715.23 = 423.84/x
  3. Step 3: Cross multiply
    479.04x = 715.23 × 423.84
  4. Step 4: Simplify right side
    479.04x = 303,143.08
  5. Step 5: Solve for x
    x = 303,143.08/479.04
  6. Step 6: Final answer
    x = 632.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.