Home / 644,761.22-889,852.30-390,114.50

Finding the Fourth Proportional to 644,761.22, 889,852.30 and 390,114.50

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Solution

The fourth proportional to 644,761.22, 889,852.30 and 390,114.50 is: 538,407.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,761.22 : 889,852.30 = 390,114.50 : x
  2. Step 2: Convert to fraction form
    644,761.22/889,852.30 = 390,114.50/x
  3. Step 3: Cross multiply
    644,761.22x = 889,852.30 × 390,114.50
  4. Step 4: Simplify right side
    644,761.22x = 347,144,279,663.80
  5. Step 5: Solve for x
    x = 347,144,279,663.80/644,761.22
  6. Step 6: Final answer
    x = 538,407.51

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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.