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Finding the Fourth Proportional to 700.74, 1,051.58 and 518.63

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Solution

The fourth proportional to 700.74, 1,051.58 and 518.63 is: 778.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.74 : 1,051.58 = 518.63 : x
  2. Step 2: Convert to fraction form
    700.74/1,051.58 = 518.63/x
  3. Step 3: Cross multiply
    700.74x = 1,051.58 × 518.63
  4. Step 4: Simplify right side
    700.74x = 545,376.97
  5. Step 5: Solve for x
    x = 545,376.97/700.74
  6. Step 6: Final answer
    x = 778.29

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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.