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Finding the Fourth Proportional to 351,771.40, 528,045.90 and 218,801.80

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Solution

The fourth proportional to 351,771.40, 528,045.90 and 218,801.80 is: 328,444.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,771.40 : 528,045.90 = 218,801.80 : x
  2. Step 2: Convert to fraction form
    351,771.40/528,045.90 = 218,801.80/x
  3. Step 3: Cross multiply
    351,771.40x = 528,045.90 × 218,801.80
  4. Step 4: Simplify right side
    351,771.40x = 115,537,393,402.62
  5. Step 5: Solve for x
    x = 115,537,393,402.62/351,771.40
  6. Step 6: Final answer
    x = 328,444.53

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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.