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Finding the Fourth Proportional to 459.68, 689.55 and 135.08

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Solution

The fourth proportional to 459.68, 689.55 and 135.08 is: 202.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.68 : 689.55 = 135.08 : x
  2. Step 2: Convert to fraction form
    459.68/689.55 = 135.08/x
  3. Step 3: Cross multiply
    459.68x = 689.55 × 135.08
  4. Step 4: Simplify right side
    459.68x = 93,144.41
  5. Step 5: Solve for x
    x = 93,144.41/459.68
  6. Step 6: Final answer
    x = 202.63

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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.