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Finding the Fourth Proportional to 573,485.12, 791,364.64 and 318,820.80

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Solution

The fourth proportional to 573,485.12, 791,364.64 and 318,820.80 is: 439,947.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,485.12 : 791,364.64 = 318,820.80 : x
  2. Step 2: Convert to fraction form
    573,485.12/791,364.64 = 318,820.80/x
  3. Step 3: Cross multiply
    573,485.12x = 791,364.64 × 318,820.80
  4. Step 4: Simplify right side
    573,485.12x = 252,303,507,616.51
  5. Step 5: Solve for x
    x = 252,303,507,616.51/573,485.12
  6. Step 6: Final answer
    x = 439,947.78

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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.