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Finding the Fourth Proportional to 459.34, 689.20 and 305.32

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Solution

The fourth proportional to 459.34, 689.20 and 305.32 is: 458.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.34 : 689.20 = 305.32 : x
  2. Step 2: Convert to fraction form
    459.34/689.20 = 305.32/x
  3. Step 3: Cross multiply
    459.34x = 689.20 × 305.32
  4. Step 4: Simplify right side
    459.34x = 210,426.54
  5. Step 5: Solve for x
    x = 210,426.54/459.34
  6. Step 6: Final answer
    x = 458.11

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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.