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Finding the Fourth Proportional to 485,969.40, 728,954.10 and 308,603.70

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Solution

The fourth proportional to 485,969.40, 728,954.10 and 308,603.70 is: 462,905.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,969.40 : 728,954.10 = 308,603.70 : x
  2. Step 2: Convert to fraction form
    485,969.40/728,954.10 = 308,603.70/x
  3. Step 3: Cross multiply
    485,969.40x = 728,954.10 × 308,603.70
  4. Step 4: Simplify right side
    485,969.40x = 224,957,932,390.17
  5. Step 5: Solve for x
    x = 224,957,932,390.17/485,969.40
  6. Step 6: Final answer
    x = 462,905.55

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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.