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Finding the Fourth Proportional to 642,259.40, 962,222.70 and 392,649.80

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Solution

The fourth proportional to 642,259.40, 962,222.70 and 392,649.80 is: 588,261.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,259.40 : 962,222.70 = 392,649.80 : x
  2. Step 2: Convert to fraction form
    642,259.40/962,222.70 = 392,649.80/x
  3. Step 3: Cross multiply
    642,259.40x = 962,222.70 × 392,649.80
  4. Step 4: Simplify right side
    642,259.40x = 377,816,550,710.46
  5. Step 5: Solve for x
    x = 377,816,550,710.46/642,259.40
  6. Step 6: Final answer
    x = 588,261.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.