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Finding the Fourth Proportional to 485,989.53, 729,309.68 and 201,680.36

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Solution

The fourth proportional to 485,989.53, 729,309.68 and 201,680.36 is: 302,655.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,989.53 : 729,309.68 = 201,680.36 : x
  2. Step 2: Convert to fraction form
    485,989.53/729,309.68 = 201,680.36/x
  3. Step 3: Cross multiply
    485,989.53x = 729,309.68 × 201,680.36
  4. Step 4: Simplify right side
    485,989.53x = 147,087,437,805.48
  5. Step 5: Solve for x
    x = 147,087,437,805.48/485,989.53
  6. Step 6: Final answer
    x = 302,655.57

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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.