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Finding the Fourth Proportional to 479.16, 718.68 and 137.16

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Solution

The fourth proportional to 479.16, 718.68 and 137.16 is: 205.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.16 : 718.68 = 137.16 : x
  2. Step 2: Convert to fraction form
    479.16/718.68 = 137.16/x
  3. Step 3: Cross multiply
    479.16x = 718.68 × 137.16
  4. Step 4: Simplify right side
    479.16x = 98,574.15
  5. Step 5: Solve for x
    x = 98,574.15/479.16
  6. Step 6: Final answer
    x = 205.72

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