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Finding the Fourth Proportional to 328,513.80, 492,770.70 and 287,835.60

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Solution

The fourth proportional to 328,513.80, 492,770.70 and 287,835.60 is: 431,753.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,513.80 : 492,770.70 = 287,835.60 : x
  2. Step 2: Convert to fraction form
    328,513.80/492,770.70 = 287,835.60/x
  3. Step 3: Cross multiply
    328,513.80x = 492,770.70 × 287,835.60
  4. Step 4: Simplify right side
    328,513.80x = 141,836,950,096.92
  5. Step 5: Solve for x
    x = 141,836,950,096.92/328,513.80
  6. Step 6: Final answer
    x = 431,753.40

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1.5x scale

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.