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Finding the Fourth Proportional to 1,400.40, 2,100.20 and 534.51

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Solution

The fourth proportional to 1,400.40, 2,100.20 and 534.51 is: 801.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.40 : 2,100.20 = 534.51 : x
  2. Step 2: Convert to fraction form
    1,400.40/2,100.20 = 534.51/x
  3. Step 3: Cross multiply
    1,400.40x = 2,100.20 × 534.51
  4. Step 4: Simplify right side
    1,400.40x = 1,122,575.23
  5. Step 5: Solve for x
    x = 1,122,575.23/1,400.40
  6. Step 6: Final answer
    x = 801.61

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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.