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Finding the Fourth Proportional to 573,445.12, 791,309.44 and 318,780.80

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Solution

The fourth proportional to 573,445.12, 791,309.44 and 318,780.80 is: 439,892.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,445.12 : 791,309.44 = 318,780.80 : x
  2. Step 2: Convert to fraction form
    573,445.12/791,309.44 = 318,780.80/x
  3. Step 3: Cross multiply
    573,445.12x = 791,309.44 × 318,780.80
  4. Step 4: Simplify right side
    573,445.12x = 252,254,256,330.75
  5. Step 5: Solve for x
    x = 252,254,256,330.75/573,445.12
  6. Step 6: Final answer
    x = 439,892.59

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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.