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Finding the Fourth Proportional to 309,059.07, 426,452.79 and 180,018.78

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Solution

The fourth proportional to 309,059.07, 426,452.79 and 180,018.78 is: 248,397.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,059.07 : 426,452.79 = 180,018.78 : x
  2. Step 2: Convert to fraction form
    309,059.07/426,452.79 = 180,018.78/x
  3. Step 3: Cross multiply
    309,059.07x = 426,452.79 × 180,018.78
  4. Step 4: Simplify right side
    309,059.07x = 76,769,510,983.40
  5. Step 5: Solve for x
    x = 76,769,510,983.40/309,059.07
  6. Step 6: Final answer
    x = 248,397.53

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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.