Home / 644,757.34-889,489.10-402,619.54

Finding the Fourth Proportional to 644,757.34, 889,489.10 and 402,619.54

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Solution

The fourth proportional to 644,757.34, 889,489.10 and 402,619.54 is: 555,442.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,757.34 : 889,489.10 = 402,619.54 : x
  2. Step 2: Convert to fraction form
    644,757.34/889,489.10 = 402,619.54/x
  3. Step 3: Cross multiply
    644,757.34x = 889,489.10 × 402,619.54
  4. Step 4: Simplify right side
    644,757.34x = 358,125,687,829.57
  5. Step 5: Solve for x
    x = 358,125,687,829.57/644,757.34
  6. Step 6: Final answer
    x = 555,442.59

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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.