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Finding the Fourth Proportional to 629,871.68, 869,225.64 and 403,648.40

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Solution

The fourth proportional to 629,871.68, 869,225.64 and 403,648.40 is: 557,036.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,871.68 : 869,225.64 = 403,648.40 : x
  2. Step 2: Convert to fraction form
    629,871.68/869,225.64 = 403,648.40/x
  3. Step 3: Cross multiply
    629,871.68x = 869,225.64 × 403,648.40
  4. Step 4: Simplify right side
    629,871.68x = 350,861,538,824.98
  5. Step 5: Solve for x
    x = 350,861,538,824.98/629,871.68
  6. Step 6: Final answer
    x = 557,036.54

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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.