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Finding the Fourth Proportional to 459.16, 688.88 and 276.78

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Solution

The fourth proportional to 459.16, 688.88 and 276.78 is: 415.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.16 : 688.88 = 276.78 : x
  2. Step 2: Convert to fraction form
    459.16/688.88 = 276.78/x
  3. Step 3: Cross multiply
    459.16x = 688.88 × 276.78
  4. Step 4: Simplify right side
    459.16x = 190,668.21
  5. Step 5: Solve for x
    x = 190,668.21/459.16
  6. Step 6: Final answer
    x = 415.25

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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.