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Finding the Fourth Proportional to 573,486.88, 791,431.78 and 315,374.40

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Solution

The fourth proportional to 573,486.88, 791,431.78 and 315,374.40 is: 435,227.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,486.88 : 791,431.78 = 315,374.40 : x
  2. Step 2: Convert to fraction form
    573,486.88/791,431.78 = 315,374.40/x
  3. Step 3: Cross multiply
    573,486.88x = 791,431.78 × 315,374.40
  4. Step 4: Simplify right side
    573,486.88x = 249,597,322,758.43
  5. Step 5: Solve for x
    x = 249,597,322,758.43/573,486.88
  6. Step 6: Final answer
    x = 435,227.61

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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.