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Finding the Fourth Proportional to 459.80, 688.97 and 391.04

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Solution

The fourth proportional to 459.80, 688.97 and 391.04 is: 585.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.80 : 688.97 = 391.04 : x
  2. Step 2: Convert to fraction form
    459.80/688.97 = 391.04/x
  3. Step 3: Cross multiply
    459.80x = 688.97 × 391.04
  4. Step 4: Simplify right side
    459.80x = 269,412.36
  5. Step 5: Solve for x
    x = 269,412.36/459.80
  6. Step 6: Final answer
    x = 585.94

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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.