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Finding the Fourth Proportional to 485,897.55, 670,538.16 and 271,037.49

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Solution

The fourth proportional to 485,897.55, 670,538.16 and 271,037.49 is: 374,031.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,897.55 : 670,538.16 = 271,037.49 : x
  2. Step 2: Convert to fraction form
    485,897.55/670,538.16 = 271,037.49/x
  3. Step 3: Cross multiply
    485,897.55x = 670,538.16 × 271,037.49
  4. Step 4: Simplify right side
    485,897.55x = 181,740,979,835.62
  5. Step 5: Solve for x
    x = 181,740,979,835.62/485,897.55
  6. Step 6: Final answer
    x = 374,031.48

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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.