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Finding the Fourth Proportional to 573,430.56, 791,361.18 and 318,786

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Solution

The fourth proportional to 573,430.56, 791,361.18 and 318,786 is: 439,939.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,430.56 : 791,361.18 = 318,786 : x
  2. Step 2: Convert to fraction form
    573,430.56/791,361.18 = 318,786/x
  3. Step 3: Cross multiply
    573,430.56x = 791,361.18 × 318,786
  4. Step 4: Simplify right side
    573,430.56x = 252,274,865,127.48
  5. Step 5: Solve for x
    x = 252,274,865,127.48/573,430.56
  6. Step 6: Final answer
    x = 439,939.69

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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.