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Finding the Fourth Proportional to 486,744.64, 671,641.20 and 271,857.28

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Solution

The fourth proportional to 486,744.64, 671,641.20 and 271,857.28 is: 375,125.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,744.64 : 671,641.20 = 271,857.28 : x
  2. Step 2: Convert to fraction form
    486,744.64/671,641.20 = 271,857.28/x
  3. Step 3: Cross multiply
    486,744.64x = 671,641.20 × 271,857.28
  4. Step 4: Simplify right side
    486,744.64x = 182,590,549,767.94
  5. Step 5: Solve for x
    x = 182,590,549,767.94/486,744.64
  6. Step 6: Final answer
    x = 375,125.96

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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.