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Finding the Fourth Proportional to 436,031.76, 655,306.53 and 405,759.58

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Solution

The fourth proportional to 436,031.76, 655,306.53 and 405,759.58 is: 609,810.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,031.76 : 655,306.53 = 405,759.58 : x
  2. Step 2: Convert to fraction form
    436,031.76/655,306.53 = 405,759.58/x
  3. Step 3: Cross multiply
    436,031.76x = 655,306.53 × 405,759.58
  4. Step 4: Simplify right side
    436,031.76x = 265,896,900,365.39
  5. Step 5: Solve for x
    x = 265,896,900,365.39/436,031.76
  6. Step 6: Final answer
    x = 609,810.86

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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.