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Finding the Fourth Proportional to 289,012.11, 398,830.30 and 158,189.10

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Solution

The fourth proportional to 289,012.11, 398,830.30 and 158,189.10 is: 218,297.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,012.11 : 398,830.30 = 158,189.10 : x
  2. Step 2: Convert to fraction form
    289,012.11/398,830.30 = 158,189.10/x
  3. Step 3: Cross multiply
    289,012.11x = 398,830.30 × 158,189.10
  4. Step 4: Simplify right side
    289,012.11x = 63,090,606,209.73
  5. Step 5: Solve for x
    x = 63,090,606,209.73/289,012.11
  6. Step 6: Final answer
    x = 218,297.45

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.