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Finding the Fourth Proportional to 644,450.28, 889,341 and 357,997.02

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Solution

The fourth proportional to 644,450.28, 889,341 and 357,997.02 is: 494,035.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,450.28 : 889,341 = 357,997.02 : x
  2. Step 2: Convert to fraction form
    644,450.28/889,341 = 357,997.02/x
  3. Step 3: Cross multiply
    644,450.28x = 889,341 × 357,997.02
  4. Step 4: Simplify right side
    644,450.28x = 318,381,427,763.82
  5. Step 5: Solve for x
    x = 318,381,427,763.82/644,450.28
  6. Step 6: Final answer
    x = 494,035.67

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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.