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Finding the Fourth Proportional to 572,819, 790,490.28 and 318,193.88

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Solution

The fourth proportional to 572,819, 790,490.28 and 318,193.88 is: 439,107.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,819 : 790,490.28 = 318,193.88 : x
  2. Step 2: Convert to fraction form
    572,819/790,490.28 = 318,193.88/x
  3. Step 3: Cross multiply
    572,819x = 790,490.28 × 318,193.88
  4. Step 4: Simplify right side
    572,819x = 251,529,169,295.49
  5. Step 5: Solve for x
    x = 251,529,169,295.49/572,819
  6. Step 6: Final answer
    x = 439,107.59

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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.