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Finding the Fourth Proportional to 459.98, 690.05 and 135.32

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Solution

The fourth proportional to 459.98, 690.05 and 135.32 is: 203.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.98 : 690.05 = 135.32 : x
  2. Step 2: Convert to fraction form
    459.98/690.05 = 135.32/x
  3. Step 3: Cross multiply
    459.98x = 690.05 × 135.32
  4. Step 4: Simplify right side
    459.98x = 93,373.44
  5. Step 5: Solve for x
    x = 93,373.44/459.98
  6. Step 6: Final answer
    x = 203.00

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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.