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Finding the Fourth Proportional to 309,000.39, 426,385.30 and 173,015.43

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Solution

The fourth proportional to 309,000.39, 426,385.30 and 173,015.43 is: 238,741.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,000.39 : 426,385.30 = 173,015.43 : x
  2. Step 2: Convert to fraction form
    309,000.39/426,385.30 = 173,015.43/x
  3. Step 3: Cross multiply
    309,000.39x = 426,385.30 × 173,015.43
  4. Step 4: Simplify right side
    309,000.39x = 73,771,236,025.18
  5. Step 5: Solve for x
    x = 73,771,236,025.18/309,000.39
  6. Step 6: Final answer
    x = 238,741.56

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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.