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Finding the Fourth Proportional to 572,969.36, 790,697.40 and 318,344.24

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Solution

The fourth proportional to 572,969.36, 790,697.40 and 318,344.24 is: 439,314.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,969.36 : 790,697.40 = 318,344.24 : x
  2. Step 2: Convert to fraction form
    572,969.36/790,697.40 = 318,344.24/x
  3. Step 3: Cross multiply
    572,969.36x = 790,697.40 × 318,344.24
  4. Step 4: Simplify right side
    572,969.36x = 251,713,962,872.98
  5. Step 5: Solve for x
    x = 251,713,962,872.98/572,969.36
  6. Step 6: Final answer
    x = 439,314.88

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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.