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Finding the Fourth Proportional to 309,218.88, 427,581 and 245,445.96

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Solution

The fourth proportional to 309,218.88, 427,581 and 245,445.96 is: 339,397.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,218.88 : 427,581 = 245,445.96 : x
  2. Step 2: Convert to fraction form
    309,218.88/427,581 = 245,445.96/x
  3. Step 3: Cross multiply
    309,218.88x = 427,581 × 245,445.96
  4. Step 4: Simplify right side
    309,218.88x = 104,948,029,022.76
  5. Step 5: Solve for x
    x = 104,948,029,022.76/309,218.88
  6. Step 6: Final answer
    x = 339,397.22

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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.