Home / 644,456.46-889,206.75-389,802.18

Finding the Fourth Proportional to 644,456.46, 889,206.75 and 389,802.18

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Solution

The fourth proportional to 644,456.46, 889,206.75 and 389,802.18 is: 537,840.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,456.46 : 889,206.75 = 389,802.18 : x
  2. Step 2: Convert to fraction form
    644,456.46/889,206.75 = 389,802.18/x
  3. Step 3: Cross multiply
    644,456.46x = 889,206.75 × 389,802.18
  4. Step 4: Simplify right side
    644,456.46x = 346,614,729,620.72
  5. Step 5: Solve for x
    x = 346,614,729,620.72/644,456.46
  6. Step 6: Final answer
    x = 537,840.41

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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.