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Finding the Fourth Proportional to 268,486.40, 403,604.40 and 190,143.20

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Solution

The fourth proportional to 268,486.40, 403,604.40 and 190,143.20 is: 285,834.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,486.40 : 403,604.40 = 190,143.20 : x
  2. Step 2: Convert to fraction form
    268,486.40/403,604.40 = 190,143.20/x
  3. Step 3: Cross multiply
    268,486.40x = 403,604.40 × 190,143.20
  4. Step 4: Simplify right side
    268,486.40x = 76,742,632,150.08
  5. Step 5: Solve for x
    x = 76,742,632,150.08/268,486.40
  6. Step 6: Final answer
    x = 285,834.34

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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.