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Finding the Fourth Proportional to 497,990.83, 687,221.35 and 271,631.47

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Solution

The fourth proportional to 497,990.83, 687,221.35 and 271,631.47 is: 374,848.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    497,990.83 : 687,221.35 = 271,631.47 : x
  2. Step 2: Convert to fraction form
    497,990.83/687,221.35 = 271,631.47/x
  3. Step 3: Cross multiply
    497,990.83x = 687,221.35 × 271,631.47
  4. Step 4: Simplify right side
    497,990.83x = 186,670,945,515.88
  5. Step 5: Solve for x
    x = 186,670,945,515.88/497,990.83
  6. Step 6: Final answer
    x = 374,848.16

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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.