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Finding the Fourth Proportional to 309,159.38, 426,636.01 and 173,190.86

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Solution

The fourth proportional to 309,159.38, 426,636.01 and 173,190.86 is: 239,001.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,159.38 : 426,636.01 = 173,190.86 : x
  2. Step 2: Convert to fraction form
    309,159.38/426,636.01 = 173,190.86/x
  3. Step 3: Cross multiply
    309,159.38x = 426,636.01 × 173,190.86
  4. Step 4: Simplify right side
    309,159.38x = 73,889,457,162.06
  5. Step 5: Solve for x
    x = 73,889,457,162.06/309,159.38
  6. Step 6: Final answer
    x = 239,001.18

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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.