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Finding the Fourth Proportional to 629,495.71, 868,676.87 and 357,562.78

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Solution

The fourth proportional to 629,495.71, 868,676.87 and 357,562.78 is: 493,421.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,495.71 : 868,676.87 = 357,562.78 : x
  2. Step 2: Convert to fraction form
    629,495.71/868,676.87 = 357,562.78/x
  3. Step 3: Cross multiply
    629,495.71x = 868,676.87 × 357,562.78
  4. Step 4: Simplify right side
    629,495.71x = 310,606,515,281.11
  5. Step 5: Solve for x
    x = 310,606,515,281.11/629,495.71
  6. Step 6: Final answer
    x = 493,421.18

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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.