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Finding the Fourth Proportional to 641,860.09, 885,780.74 and 351,483.91

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Solution

The fourth proportional to 641,860.09, 885,780.74 and 351,483.91 is: 485,055.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,860.09 : 885,780.74 = 351,483.91 : x
  2. Step 2: Convert to fraction form
    641,860.09/885,780.74 = 351,483.91/x
  3. Step 3: Cross multiply
    641,860.09x = 885,780.74 × 351,483.91
  4. Step 4: Simplify right side
    641,860.09x = 311,337,677,897.89
  5. Step 5: Solve for x
    x = 311,337,677,897.89/641,860.09
  6. Step 6: Final answer
    x = 485,055.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.