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Finding the Fourth Proportional to 700.86, 1,051.53 and 423.54

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Solution

The fourth proportional to 700.86, 1,051.53 and 423.54 is: 635.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.86 : 1,051.53 = 423.54 : x
  2. Step 2: Convert to fraction form
    700.86/1,051.53 = 423.54/x
  3. Step 3: Cross multiply
    700.86x = 1,051.53 × 423.54
  4. Step 4: Simplify right side
    700.86x = 445,365.02
  5. Step 5: Solve for x
    x = 445,365.02/700.86
  6. Step 6: Final answer
    x = 635.46

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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.