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Finding the Fourth Proportional to 644,380.94, 889,220.94 and 357,919.28

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Solution

The fourth proportional to 644,380.94, 889,220.94 and 357,919.28 is: 493,914.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,380.94 : 889,220.94 = 357,919.28 : x
  2. Step 2: Convert to fraction form
    644,380.94/889,220.94 = 357,919.28/x
  3. Step 3: Cross multiply
    644,380.94x = 889,220.94 × 357,919.28
  4. Step 4: Simplify right side
    644,380.94x = 318,269,318,605.72
  5. Step 5: Solve for x
    x = 318,269,318,605.72/644,380.94
  6. Step 6: Final answer
    x = 493,914.86

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1.5x scale

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.