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Finding the Fourth Proportional to 662,804.20, 994,371.90 and 213,567.40

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Solution

The fourth proportional to 662,804.20, 994,371.90 and 213,567.40 is: 320,404.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,804.20 : 994,371.90 = 213,567.40 : x
  2. Step 2: Convert to fraction form
    662,804.20/994,371.90 = 213,567.40/x
  3. Step 3: Cross multiply
    662,804.20x = 994,371.90 × 213,567.40
  4. Step 4: Simplify right side
    662,804.20x = 212,365,421,316.06
  5. Step 5: Solve for x
    x = 212,365,421,316.06/662,804.20
  6. Step 6: Final answer
    x = 320,404.46

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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.