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Finding the Fourth Proportional to 659,287.40, 988,499.10 and 259,687.40

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Solution

The fourth proportional to 659,287.40, 988,499.10 and 259,687.40 is: 389,360.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,287.40 : 988,499.10 = 259,687.40 : x
  2. Step 2: Convert to fraction form
    659,287.40/988,499.10 = 259,687.40/x
  3. Step 3: Cross multiply
    659,287.40x = 988,499.10 × 259,687.40
  4. Step 4: Simplify right side
    659,287.40x = 256,700,761,181.34
  5. Step 5: Solve for x
    x = 256,700,761,181.34/659,287.40
  6. Step 6: Final answer
    x = 389,360.94

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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.