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Finding the Fourth Proportional to 699.74, 1,051.35 and 453.10

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Solution

The fourth proportional to 699.74, 1,051.35 and 453.10 is: 680.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.74 : 1,051.35 = 453.10 : x
  2. Step 2: Convert to fraction form
    699.74/1,051.35 = 453.10/x
  3. Step 3: Cross multiply
    699.74x = 1,051.35 × 453.10
  4. Step 4: Simplify right side
    699.74x = 476,366.69
  5. Step 5: Solve for x
    x = 476,366.69/699.74
  6. Step 6: Final answer
    x = 680.78

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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.