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Finding the Fourth Proportional to 1,407.99, 2,112.12 and 483.72

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Solution

The fourth proportional to 1,407.99, 2,112.12 and 483.72 is: 725.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.99 : 2,112.12 = 483.72 : x
  2. Step 2: Convert to fraction form
    1,407.99/2,112.12 = 483.72/x
  3. Step 3: Cross multiply
    1,407.99x = 2,112.12 × 483.72
  4. Step 4: Simplify right side
    1,407.99x = 1,021,674.69
  5. Step 5: Solve for x
    x = 1,021,674.69/1,407.99
  6. Step 6: Final answer
    x = 725.63

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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.