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Finding the Fourth Proportional to 449,246.60, 620,616.12 and 388,712.14

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Solution

The fourth proportional to 449,246.60, 620,616.12 and 388,712.14 is: 536,990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,246.60 : 620,616.12 = 388,712.14 : x
  2. Step 2: Convert to fraction form
    449,246.60/620,616.12 = 388,712.14/x
  3. Step 3: Cross multiply
    449,246.60x = 620,616.12 × 388,712.14
  4. Step 4: Simplify right side
    449,246.60x = 241,241,020,123.70
  5. Step 5: Solve for x
    x = 241,241,020,123.70/449,246.60
  6. Step 6: Final answer
    x = 536,990.20

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Why These Related Problems?

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