Home / 387,729.12-581,763.60-188,202.72

Finding the Fourth Proportional to 387,729.12, 581,763.60 and 188,202.72

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Solution

The fourth proportional to 387,729.12, 581,763.60 and 188,202.72 is: 282,386.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,729.12 : 581,763.60 = 188,202.72 : x
  2. Step 2: Convert to fraction form
    387,729.12/581,763.60 = 188,202.72/x
  3. Step 3: Cross multiply
    387,729.12x = 581,763.60 × 188,202.72
  4. Step 4: Simplify right side
    387,729.12x = 109,489,491,916.99
  5. Step 5: Solve for x
    x = 109,489,491,916.99/387,729.12
  6. Step 6: Final answer
    x = 282,386.56

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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.