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Finding the Fourth Proportional to 572,715.95, 790,253.15 and 331,021.08

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Solution

The fourth proportional to 572,715.95, 790,253.15 and 331,021.08 is: 456,754.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,715.95 : 790,253.15 = 331,021.08 : x
  2. Step 2: Convert to fraction form
    572,715.95/790,253.15 = 331,021.08/x
  3. Step 3: Cross multiply
    572,715.95x = 790,253.15 × 331,021.08
  4. Step 4: Simplify right side
    572,715.95x = 261,590,449,531.30
  5. Step 5: Solve for x
    x = 261,590,449,531.30/572,715.95
  6. Step 6: Final answer
    x = 456,754.26

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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.