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Finding the Fourth Proportional to 644,282.56, 889,085.58 and 357,821.10

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Solution

The fourth proportional to 644,282.56, 889,085.58 and 357,821.10 is: 493,779.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,282.56 : 889,085.58 = 357,821.10 : x
  2. Step 2: Convert to fraction form
    644,282.56/889,085.58 = 357,821.10/x
  3. Step 3: Cross multiply
    644,282.56x = 889,085.58 × 357,821.10
  4. Step 4: Simplify right side
    644,282.56x = 318,133,580,229.74
  5. Step 5: Solve for x
    x = 318,133,580,229.74/644,282.56
  6. Step 6: Final answer
    x = 493,779.59

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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.