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Finding the Fourth Proportional to 357,640.20, 536,460.30 and 318,241.80

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Solution

The fourth proportional to 357,640.20, 536,460.30 and 318,241.80 is: 477,362.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,640.20 : 536,460.30 = 318,241.80 : x
  2. Step 2: Convert to fraction form
    357,640.20/536,460.30 = 318,241.80/x
  3. Step 3: Cross multiply
    357,640.20x = 536,460.30 × 318,241.80
  4. Step 4: Simplify right side
    357,640.20x = 170,724,091,500.54
  5. Step 5: Solve for x
    x = 170,724,091,500.54/357,640.20
  6. Step 6: Final answer
    x = 477,362.70

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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.