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Finding the Fourth Proportional to 498,715.80, 747,020.70 and 330,316.80

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Solution

The fourth proportional to 498,715.80, 747,020.70 and 330,316.80 is: 494,777.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,715.80 : 747,020.70 = 330,316.80 : x
  2. Step 2: Convert to fraction form
    498,715.80/747,020.70 = 330,316.80/x
  3. Step 3: Cross multiply
    498,715.80x = 747,020.70 × 330,316.80
  4. Step 4: Simplify right side
    498,715.80x = 246,753,487,157.76
  5. Step 5: Solve for x
    x = 246,753,487,157.76/498,715.80
  6. Step 6: Final answer
    x = 494,777.76

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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.