Home / 513,286-769,916.04-139,299.28

Finding the Fourth Proportional to 513,286, 769,916.04 and 139,299.28

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Solution

The fourth proportional to 513,286, 769,916.04 and 139,299.28 is: 208,945.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,286 : 769,916.04 = 139,299.28 : x
  2. Step 2: Convert to fraction form
    513,286/769,916.04 = 139,299.28/x
  3. Step 3: Cross multiply
    513,286x = 769,916.04 × 139,299.28
  4. Step 4: Simplify right side
    513,286x = 107,248,750,032.45
  5. Step 5: Solve for x
    x = 107,248,750,032.45/513,286
  6. Step 6: Final answer
    x = 208,945.40

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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.