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Finding the Fourth Proportional to 479.84, 718.80 and 317.12

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Solution

The fourth proportional to 479.84, 718.80 and 317.12 is: 475.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.84 : 718.80 = 317.12 : x
  2. Step 2: Convert to fraction form
    479.84/718.80 = 317.12/x
  3. Step 3: Cross multiply
    479.84x = 718.80 × 317.12
  4. Step 4: Simplify right side
    479.84x = 227,945.86
  5. Step 5: Solve for x
    x = 227,945.86/479.84
  6. Step 6: Final answer
    x = 475.05

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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.