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Finding the Fourth Proportional to 459.83, 690.43 and 446.16

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Solution

The fourth proportional to 459.83, 690.43 and 446.16 is: 669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.83 : 690.43 = 446.16 : x
  2. Step 2: Convert to fraction form
    459.83/690.43 = 446.16/x
  3. Step 3: Cross multiply
    459.83x = 690.43 × 446.16
  4. Step 4: Simplify right side
    459.83x = 308,042.25
  5. Step 5: Solve for x
    x = 308,042.25/459.83
  6. Step 6: Final answer
    x = 669.90

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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.