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Finding the Fourth Proportional to 574,389.12, 792,638.40 and 319,731.84

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Solution

The fourth proportional to 574,389.12, 792,638.40 and 319,731.84 is: 441,219.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    574,389.12 : 792,638.40 = 319,731.84 : x
  2. Step 2: Convert to fraction form
    574,389.12/792,638.40 = 319,731.84/x
  3. Step 3: Cross multiply
    574,389.12x = 792,638.40 × 319,731.84
  4. Step 4: Simplify right side
    574,389.12x = 253,431,734,086.66
  5. Step 5: Solve for x
    x = 253,431,734,086.66/574,389.12
  6. Step 6: Final answer
    x = 441,219.59

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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.