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Finding the Fourth Proportional to 486,748.64, 671,646.72 and 271,861.28

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Solution

The fourth proportional to 486,748.64, 671,646.72 and 271,861.28 is: 375,131.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,748.64 : 671,646.72 = 271,861.28 : x
  2. Step 2: Convert to fraction form
    486,748.64/671,646.72 = 271,861.28/x
  3. Step 3: Cross multiply
    486,748.64x = 671,646.72 × 271,861.28
  4. Step 4: Simplify right side
    486,748.64x = 182,594,737,007.00
  5. Step 5: Solve for x
    x = 182,594,737,007.00/486,748.64
  6. Step 6: Final answer
    x = 375,131.48

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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.