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Finding the Fourth Proportional to 489,042.30, 733,563.45 and 485,931.90

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Solution

The fourth proportional to 489,042.30, 733,563.45 and 485,931.90 is: 728,897.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,042.30 : 733,563.45 = 485,931.90 : x
  2. Step 2: Convert to fraction form
    489,042.30/733,563.45 = 485,931.90/x
  3. Step 3: Cross multiply
    489,042.30x = 733,563.45 × 485,931.90
  4. Step 4: Simplify right side
    489,042.30x = 356,461,881,029.06
  5. Step 5: Solve for x
    x = 356,461,881,029.06/489,042.30
  6. Step 6: Final answer
    x = 728,897.85

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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.