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Finding the Fourth Proportional to 644,278.56, 889,080.06 and 357,817.10

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Solution

The fourth proportional to 644,278.56, 889,080.06 and 357,817.10 is: 493,774.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,278.56 : 889,080.06 = 357,817.10 : x
  2. Step 2: Convert to fraction form
    644,278.56/889,080.06 = 357,817.10/x
  3. Step 3: Cross multiply
    644,278.56x = 889,080.06 × 357,817.10
  4. Step 4: Simplify right side
    644,278.56x = 318,128,045,633.44
  5. Step 5: Solve for x
    x = 318,128,045,633.44/644,278.56
  6. Step 6: Final answer
    x = 493,774.07

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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.