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Finding the Fourth Proportional to 308,518.60, 462,687.12 and 139,941.40

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Solution

The fourth proportional to 308,518.60, 462,687.12 and 139,941.40 is: 209,870.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,518.60 : 462,687.12 = 139,941.40 : x
  2. Step 2: Convert to fraction form
    308,518.60/462,687.12 = 139,941.40/x
  3. Step 3: Cross multiply
    308,518.60x = 462,687.12 × 139,941.40
  4. Step 4: Simplify right side
    308,518.60x = 64,749,083,334.77
  5. Step 5: Solve for x
    x = 64,749,083,334.77/308,518.60
  6. Step 6: Final answer
    x = 209,870.92

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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.