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Finding the Fourth Proportional to 545,860.10, 819,404.55 and 421,751.30

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Solution

The fourth proportional to 545,860.10, 819,404.55 and 421,751.30 is: 633,101.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,860.10 : 819,404.55 = 421,751.30 : x
  2. Step 2: Convert to fraction form
    545,860.10/819,404.55 = 421,751.30/x
  3. Step 3: Cross multiply
    545,860.10x = 819,404.55 × 421,751.30
  4. Step 4: Simplify right side
    545,860.10x = 345,584,934,188.42
  5. Step 5: Solve for x
    x = 345,584,934,188.42/545,860.10
  6. Step 6: Final answer
    x = 633,101.66

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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.