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Finding the Fourth Proportional to 1,483.45, 2,225.13 and 387.82

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Solution

The fourth proportional to 1,483.45, 2,225.13 and 387.82 is: 581.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,483.45 : 2,225.13 = 387.82 : x
  2. Step 2: Convert to fraction form
    1,483.45/2,225.13 = 387.82/x
  3. Step 3: Cross multiply
    1,483.45x = 2,225.13 × 387.82
  4. Step 4: Simplify right side
    1,483.45x = 862,949.92
  5. Step 5: Solve for x
    x = 862,949.92/1,483.45
  6. Step 6: Final answer
    x = 581.72

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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.