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Finding the Fourth Proportional to 644,521.60, 889,440.78 and 358,034.32

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Solution

The fourth proportional to 644,521.60, 889,440.78 and 358,034.32 is: 494,087.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,521.60 : 889,440.78 = 358,034.32 : x
  2. Step 2: Convert to fraction form
    644,521.60/889,440.78 = 358,034.32/x
  3. Step 3: Cross multiply
    644,521.60x = 889,440.78 × 358,034.32
  4. Step 4: Simplify right side
    644,521.60x = 318,450,324,847.57
  5. Step 5: Solve for x
    x = 318,450,324,847.57/644,521.60
  6. Step 6: Final answer
    x = 494,087.90

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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.