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Finding the Fourth Proportional to 485,883.90, 729,153.90 and 272,651.40

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Solution

The fourth proportional to 485,883.90, 729,153.90 and 272,651.40 is: 409,161.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,883.90 : 729,153.90 = 272,651.40 : x
  2. Step 2: Convert to fraction form
    485,883.90/729,153.90 = 272,651.40/x
  3. Step 3: Cross multiply
    485,883.90x = 729,153.90 × 272,651.40
  4. Step 4: Simplify right side
    485,883.90x = 198,804,831,650.46
  5. Step 5: Solve for x
    x = 198,804,831,650.46/485,883.90
  6. Step 6: Final answer
    x = 409,161.18

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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.