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Finding the Fourth Proportional to 439,814.40, 659,721.60 and 262,521.60

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Solution

The fourth proportional to 439,814.40, 659,721.60 and 262,521.60 is: 393,782.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,814.40 : 659,721.60 = 262,521.60 : x
  2. Step 2: Convert to fraction form
    439,814.40/659,721.60 = 262,521.60/x
  3. Step 3: Cross multiply
    439,814.40x = 659,721.60 × 262,521.60
  4. Step 4: Simplify right side
    439,814.40x = 173,191,169,986.56
  5. Step 5: Solve for x
    x = 173,191,169,986.56/439,814.40
  6. Step 6: Final answer
    x = 393,782.40

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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.