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Finding the Fourth Proportional to 644,708.40, 889,493.88 and 386,532.24

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Solution

The fourth proportional to 644,708.40, 889,493.88 and 386,532.24 is: 533,292.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,708.40 : 889,493.88 = 386,532.24 : x
  2. Step 2: Convert to fraction form
    644,708.40/889,493.88 = 386,532.24/x
  3. Step 3: Cross multiply
    644,708.40x = 889,493.88 × 386,532.24
  4. Step 4: Simplify right side
    644,708.40x = 343,818,061,902.69
  5. Step 5: Solve for x
    x = 343,818,061,902.69/644,708.40
  6. Step 6: Final answer
    x = 533,292.36

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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.