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Finding the Fourth Proportional to 459.68, 634.80 and 285.08

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Solution

The fourth proportional to 459.68, 634.80 and 285.08 is: 393.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.68 : 634.80 = 285.08 : x
  2. Step 2: Convert to fraction form
    459.68/634.80 = 285.08/x
  3. Step 3: Cross multiply
    459.68x = 634.80 × 285.08
  4. Step 4: Simplify right side
    459.68x = 180,968.78
  5. Step 5: Solve for x
    x = 180,968.78/459.68
  6. Step 6: Final answer
    x = 393.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.