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Finding the Fourth Proportional to 573,436.56, 791,390.32 and 318,811.44

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Solution

The fourth proportional to 573,436.56, 791,390.32 and 318,811.44 is: 439,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,436.56 : 791,390.32 = 318,811.44 : x
  2. Step 2: Convert to fraction form
    573,436.56/791,390.32 = 318,811.44/x
  3. Step 3: Cross multiply
    573,436.56x = 791,390.32 × 318,811.44
  4. Step 4: Simplify right side
    573,436.56x = 252,304,287,521.26
  5. Step 5: Solve for x
    x = 252,304,287,521.26/573,436.56
  6. Step 6: Final answer
    x = 439,986.40

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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.