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Finding the Fourth Proportional to 1,551.48, 2,141.42 and 879.45

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Solution

The fourth proportional to 1,551.48, 2,141.42 and 879.45 is: 1,213.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.48 : 2,141.42 = 879.45 : x
  2. Step 2: Convert to fraction form
    1,551.48/2,141.42 = 879.45/x
  3. Step 3: Cross multiply
    1,551.48x = 2,141.42 × 879.45
  4. Step 4: Simplify right side
    1,551.48x = 1,883,267.42
  5. Step 5: Solve for x
    x = 1,883,267.42/1,551.48
  6. Step 6: Final answer
    x = 1,213.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.