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Finding the Fourth Proportional to 347,800.40, 521,700.60 and 300,561.20

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Solution

The fourth proportional to 347,800.40, 521,700.60 and 300,561.20 is: 450,841.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,800.40 : 521,700.60 = 300,561.20 : x
  2. Step 2: Convert to fraction form
    347,800.40/521,700.60 = 300,561.20/x
  3. Step 3: Cross multiply
    347,800.40x = 521,700.60 × 300,561.20
  4. Step 4: Simplify right side
    347,800.40x = 156,802,958,376.72
  5. Step 5: Solve for x
    x = 156,802,958,376.72/347,800.40
  6. Step 6: Final answer
    x = 450,841.80

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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.