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Finding the Fourth Proportional to 309,385.53, 426,930.55 and 171,571.57

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Solution

The fourth proportional to 309,385.53, 426,930.55 and 171,571.57 is: 236,756.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,385.53 : 426,930.55 = 171,571.57 : x
  2. Step 2: Convert to fraction form
    309,385.53/426,930.55 = 171,571.57/x
  3. Step 3: Cross multiply
    309,385.53x = 426,930.55 × 171,571.57
  4. Step 4: Simplify right side
    309,385.53x = 73,249,143,248.21
  5. Step 5: Solve for x
    x = 73,249,143,248.21/309,385.53
  6. Step 6: Final answer
    x = 236,756.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.