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Finding the Fourth Proportional to 309,887.91, 427,627.35 and 173,909.16

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Solution

The fourth proportional to 309,887.91, 427,627.35 and 173,909.16 is: 239,984.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,887.91 : 427,627.35 = 173,909.16 : x
  2. Step 2: Convert to fraction form
    309,887.91/427,627.35 = 173,909.16/x
  3. Step 3: Cross multiply
    309,887.91x = 427,627.35 × 173,909.16
  4. Step 4: Simplify right side
    309,887.91x = 74,368,313,231.53
  5. Step 5: Solve for x
    x = 74,368,313,231.53/309,887.91
  6. Step 6: Final answer
    x = 239,984.56

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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.