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Finding the Fourth Proportional to 513,021.88, 769,532.82 and 139,044.88

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Solution

The fourth proportional to 513,021.88, 769,532.82 and 139,044.88 is: 208,567.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,021.88 : 769,532.82 = 139,044.88 : x
  2. Step 2: Convert to fraction form
    513,021.88/769,532.82 = 139,044.88/x
  3. Step 3: Cross multiply
    513,021.88x = 769,532.82 × 139,044.88
  4. Step 4: Simplify right side
    513,021.88x = 106,999,598,612.96
  5. Step 5: Solve for x
    x = 106,999,598,612.96/513,021.88
  6. Step 6: Final answer
    x = 208,567.32

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Similar ratio
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1.5x scale

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.