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Finding the Fourth Proportional to 662,497.21, 993,536.65 and 213,117.90

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Solution

The fourth proportional to 662,497.21, 993,536.65 and 213,117.90 is: 319,609.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,497.21 : 993,536.65 = 213,117.90 : x
  2. Step 2: Convert to fraction form
    662,497.21/993,536.65 = 213,117.90/x
  3. Step 3: Cross multiply
    662,497.21x = 993,536.65 × 213,117.90
  4. Step 4: Simplify right side
    662,497.21x = 211,740,444,421.04
  5. Step 5: Solve for x
    x = 211,740,444,421.04/662,497.21
  6. Step 6: Final answer
    x = 319,609.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.