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Finding the Fourth Proportional to 309,394.75, 426,166.13 and 218,593.09

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Solution

The fourth proportional to 309,394.75, 426,166.13 and 218,593.09 is: 301,094.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,394.75 : 426,166.13 = 218,593.09 : x
  2. Step 2: Convert to fraction form
    309,394.75/426,166.13 = 218,593.09/x
  3. Step 3: Cross multiply
    309,394.75x = 426,166.13 × 218,593.09
  4. Step 4: Simplify right side
    309,394.75x = 93,156,971,210.04
  5. Step 5: Solve for x
    x = 93,156,971,210.04/309,394.75
  6. Step 6: Final answer
    x = 301,094.22

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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.