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Finding the Fourth Proportional to 573,326.28, 791,218.32 and 318,672

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Solution

The fourth proportional to 573,326.28, 791,218.32 and 318,672 is: 439,782.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,326.28 : 791,218.32 = 318,672 : x
  2. Step 2: Convert to fraction form
    573,326.28/791,218.32 = 318,672/x
  3. Step 3: Cross multiply
    573,326.28x = 791,218.32 × 318,672
  4. Step 4: Simplify right side
    573,326.28x = 252,139,124,471.04
  5. Step 5: Solve for x
    x = 252,139,124,471.04/573,326.28
  6. Step 6: Final answer
    x = 439,782.95

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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.