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Finding the Fourth Proportional to 644,515.80, 889,401.62 and 358,053.36

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Solution

The fourth proportional to 644,515.80, 889,401.62 and 358,053.36 is: 494,096.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,515.80 : 889,401.62 = 358,053.36 : x
  2. Step 2: Convert to fraction form
    644,515.80/889,401.62 = 358,053.36/x
  3. Step 3: Cross multiply
    644,515.80x = 889,401.62 × 358,053.36
  4. Step 4: Simplify right side
    644,515.80x = 318,453,238,430.44
  5. Step 5: Solve for x
    x = 318,453,238,430.44/644,515.80
  6. Step 6: Final answer
    x = 494,096.87

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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.