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Finding the Fourth Proportional to 347,810.40, 521,715.60 and 331,480.80

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Solution

The fourth proportional to 347,810.40, 521,715.60 and 331,480.80 is: 497,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,810.40 : 521,715.60 = 331,480.80 : x
  2. Step 2: Convert to fraction form
    347,810.40/521,715.60 = 331,480.80/x
  3. Step 3: Cross multiply
    347,810.40x = 521,715.60 × 331,480.80
  4. Step 4: Simplify right side
    347,810.40x = 172,938,704,460.48
  5. Step 5: Solve for x
    x = 172,938,704,460.48/347,810.40
  6. Step 6: Final answer
    x = 497,221.20

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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.