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Finding the Fourth Proportional to 945.57, 1,419.69 and 483.68

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Solution

The fourth proportional to 945.57, 1,419.69 and 483.68 is: 726.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.57 : 1,419.69 = 483.68 : x
  2. Step 2: Convert to fraction form
    945.57/1,419.69 = 483.68/x
  3. Step 3: Cross multiply
    945.57x = 1,419.69 × 483.68
  4. Step 4: Simplify right side
    945.57x = 686,680.98
  5. Step 5: Solve for x
    x = 686,680.98/945.57
  6. Step 6: Final answer
    x = 726.21

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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.