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Finding the Fourth Proportional to 1,400.69, 2,100.96 and 476.61

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Solution

The fourth proportional to 1,400.69, 2,100.96 and 476.61 is: 714.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.69 : 2,100.96 = 476.61 : x
  2. Step 2: Convert to fraction form
    1,400.69/2,100.96 = 476.61/x
  3. Step 3: Cross multiply
    1,400.69x = 2,100.96 × 476.61
  4. Step 4: Simplify right side
    1,400.69x = 1,001,338.55
  5. Step 5: Solve for x
    x = 1,001,338.55/1,400.69
  6. Step 6: Final answer
    x = 714.89

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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.