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Finding the Fourth Proportional to 309,887.52, 427,627.20 and 173,908.80

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Solution

The fourth proportional to 309,887.52, 427,627.20 and 173,908.80 is: 239,984.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,887.52 : 427,627.20 = 173,908.80 : x
  2. Step 2: Convert to fraction form
    309,887.52/427,627.20 = 173,908.80/x
  3. Step 3: Cross multiply
    309,887.52x = 427,627.20 × 173,908.80
  4. Step 4: Simplify right side
    309,887.52x = 74,368,133,199.36
  5. Step 5: Solve for x
    x = 74,368,133,199.36/309,887.52
  6. Step 6: Final answer
    x = 239,984.28

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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.