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Finding the Fourth Proportional to 479.53, 718.69 and 260.15

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Solution

The fourth proportional to 479.53, 718.69 and 260.15 is: 389.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.53 : 718.69 = 260.15 : x
  2. Step 2: Convert to fraction form
    479.53/718.69 = 260.15/x
  3. Step 3: Cross multiply
    479.53x = 718.69 × 260.15
  4. Step 4: Simplify right side
    479.53x = 186,967.20
  5. Step 5: Solve for x
    x = 186,967.20/479.53
  6. Step 6: Final answer
    x = 389.90

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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.