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Finding the Fourth Proportional to 485,897.70, 670,534.20 and 268,108.32

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Solution

The fourth proportional to 485,897.70, 670,534.20 and 268,108.32 is: 369,986.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,897.70 : 670,534.20 = 268,108.32 : x
  2. Step 2: Convert to fraction form
    485,897.70/670,534.20 = 268,108.32/x
  3. Step 3: Cross multiply
    485,897.70x = 670,534.20 × 268,108.32
  4. Step 4: Simplify right side
    485,897.70x = 179,775,797,864.54
  5. Step 5: Solve for x
    x = 179,775,797,864.54/485,897.70
  6. Step 6: Final answer
    x = 369,986.93

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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.