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Finding the Fourth Proportional to 629,869.68, 869,222.88 and 403,646.40

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Solution

The fourth proportional to 629,869.68, 869,222.88 and 403,646.40 is: 557,033.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,869.68 : 869,222.88 = 403,646.40 : x
  2. Step 2: Convert to fraction form
    629,869.68/869,222.88 = 403,646.40/x
  3. Step 3: Cross multiply
    629,869.68x = 869,222.88 × 403,646.40
  4. Step 4: Simplify right side
    629,869.68x = 350,858,686,309.63
  5. Step 5: Solve for x
    x = 350,858,686,309.63/629,869.68
  6. Step 6: Final answer
    x = 557,033.78

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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.