Home / 644,915.10-889,976.43-358,429.04

Finding the Fourth Proportional to 644,915.10, 889,976.43 and 358,429.04

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Solution

The fourth proportional to 644,915.10, 889,976.43 and 358,429.04 is: 494,628.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,915.10 : 889,976.43 = 358,429.04 : x
  2. Step 2: Convert to fraction form
    644,915.10/889,976.43 = 358,429.04/x
  3. Step 3: Cross multiply
    644,915.10x = 889,976.43 × 358,429.04
  4. Step 4: Simplify right side
    644,915.10x = 318,993,397,427.53
  5. Step 5: Solve for x
    x = 318,993,397,427.53/644,915.10
  6. Step 6: Final answer
    x = 494,628.51

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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.